Just in case anyone is interested I typed this up for the other thread I have on the S10, hopefully someone will find this useful, if you read this entire reply and aren't doing something similar you are insane, if I were you I'd glaze over it.

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So here is the total and complete parts breakdown, this is going to take me a while.
Notes, this list is for installing a LQ4 and 4L80E from a 2002 Silverado 2500 into a 2001 S10 with a 2.2 using the truck accessories, intake, and fuel rail. There are some misc. bolts, clips, hose clamps etc. that you will need I didn’t list but had laying around. I recommend when you go to a junk yard to grab a pocket/bucket full of this stuff and take it with you, dirt cheap compared to having to buy new all the time.
Truck- $500
Bought off of my brother with a blown engine
Donor Truck- $2,300
CL purchase, pulled engine, trans, and driveshaft sold for $600
Tag, Title, License-$139.25
Wiring Harness-$830
Purchased from CPW, 9 week delivery, but well worth it for me, could be done cheaper though.
Computer Tuning-$free
I purchased HP Tuners and used 2 of their free credits, but if I had to buy them it would have been $100, or CPW would tune it for gears, and tire size as well as turn off all unnecessary stuff for $175, that may have been the better option
Engine Mounts, Shorty Headers, and Oil Pan-$499.5
CPW, ordered as a package and it was the cheapest way I could find to get the headers and oil pan with windage tray and dip stick as well as new bolts. The headers fit great but needed some hammer work around the passenger upper control arm. Alternatively you could use a tubular upper control arm and not beat up your new headers.
Oil Filter-$5
I think it was Oreillys part number PF48
Round Coil Packs-$100
I had a complete set from another engine, or you could get lucky and your engine already have them, but they can be had for $100 on EBay, PN 19005218.
AC Relocation Brackets-$227
Purchased from CPW, if I had a tig welded I would get it perfectly aligned and tack some of this together so it is easier to remove if ever needed. Keep the instructions close by.
Belt Tensioner-$25.51
This is needed only when using the AC Relocation brackets purchased from CPW, it can be omitted if using stock AC, or no AC. PN 12560344
AC lines -$225
Also a CPW purchase, I’m still trying to get the right one for the truck accessories, not sure what the problem is here just yet.
AC Compressor -$129.84
Ebay Sanden 4665, it probably isn’t a true Sanden, but hopefully it’ll work, could also be purchased from CPW for $200
AC Charging -$150
This is an estimate but should be pretty close, alternatively you could rent the vacuum pump from Oreillys and charge it yourself, but I don’t want to get into that with so many new expensive parts, I want someone else to have that liability.
Coolant Overflow Tank-$260
CPW, if you install the high mount AC compressor you must have this tank or make your own, or something because the compressor hits the stock tank. Great build quality though and I highly recommend it.
Trans Crossmember -$319
G-Force Perf. RCS10-4L80, for the money it didn’t fit very well, next time I’ll just build my own, but it is heck for stout.
EGR Blockoff Plug -$11.92
Ebay, easy and done.
Trans AN Fittings -$14.09
These are the fittings that connect to the 4L80E Russell PN RUS641390
AN 90° to Hose -$62.94
EBay I used 6 of these for the trans to radiator and for radiator to trans cooler and back, I really like AN fittings after using them, but you could save money by trying to get your old cooler lines to work. Russell PN RUS610165
3/8" NPT to -6 AN -$11.94
EBay This is needed to go from the trans cooler to the AN fittings. Russell PN RUS660463
1/2"-20 Inverted Flare (Rad) -$11.18
EBay, I couldn’t find these in the Russell catalog, but these go from the CPW radiator to -6 AN PN 2D058286468TVM4
AN Hose -6 -$92.53
EBay I ended up buying 2 20’ rolls and have a probably 1’ left over, I used the same hose for trans lines and fuel lines. Russell PN RUS632095
Trans mount -$12.35
EBay I needed this to bolt up to the cross member, not sure why but the cross member didn’t use the same style as the factory mount.
Driveshaft Shortening -$90
I had this done locally but from what I’ve read it is a pretty typical price. I reused the S-10 2 piece drive shaft and only had the front shortened 1.25”. Alternatively I could have bolted in the front shaft from the donor and shortened the rear. I’ll probably do this when I get a bigger axle which is the stock open 4.10 diff now.
Adaptor U Joint -$30.41
Napa, This is the joint I needed to go from the S10 shaft to the 4L80E Yoke. PN UJ447
Radiator, Fans, Shroud, and AC Condenser-$1,045
CPW, good instructions, and was easy to install and fit great. Have a hole saw, sawzall, and angle grinder handy for clearance work for AC Lines.
Steam Vent Fitting on Rad. -$3.05
EBay, 5/16" Hose barb to 1/4" NPT fitting, I reused the steam vent hose that came with the donor truck.
Radiator Cap -$14.95
EBay I don’t know why but when you spend all that money on a radiator it doesn’t come with a cap, buy one ahead of time.
Fluids-$69.44
Wal-Mart, Trans. Fluid, Antifreeze (full strength then buy “baby water” for $1 a gallon and mix your own 50/50, cheaper than the pre-diluted stuff), power steering fluid, and engine oil, you did remember to put oil in that thing didn’t you?
Coolant Hoses-$11.50
Oreillys, I was able to reuse the lower hose, I think it was PN 22437 (Gates hose number), but had to cut it down some, the upper hose was a pain but Masterpro 21970 (I feel like I should only tell people this number if they send me $5 because I could NOT find it online anywhere and CPW didn’t even know what it was) worked for me with a Zip Tie to hold it away from the belt, it also had to be cut down some.
Heater core hoses -$15.10
Oreillys, I picked up 6’ of 5/8” and 3/4” coolant hose and routed them as needed.
Throttle Cable -$40.39
EBay, it is the cable from the 4.3 trucks, install this in the truck before you install the engine. PN 15010419
Cruise Cable -$51.72
EBay, it is the cable from the 4.3 trucks, install this in the truck before you install the engine. PN 15045460
Mufflers, exhaust pipe, bends, V band clamps, flex joints, etc.-$179.91
Ebay/Oreillys, This is going to be person specific, I welded my own up and it turned out okay but the Flowmaster 10 mufflers…I know why they call them drone masters now, but they sound great at WOT. You’d be into it about the same at a local muffler shop, but you may not get the mandrel bends like I bought.
Header Bolts -$30.94
EBay, If you don’t break off a header bolt in your engine, you are the master. I ended up welding a dot on the end of the stud, then repeat until you can grab it with some good pliers (I HIGHLY recommend Knipex, not cheap but they are great, I’ll never go back to normal channel locks again.) and twist. One stud took me 17 tries but I won. I used ARP 134-1102 to replace them with, re-torque after the first run to operating temp, then again after about 100 miles
Header Gaskets -$24.78
EBay, I like factory gaskets, they last forever in stock applications so why not. PN 12617944
Fuel Lines-$150.67
Online, I had the flex fuel truck with the regulator/return on the filter like the corvette filter and changed it over to use the regulator/return on the fuel rails from the LQ4. I chose to use all -6 AN lines and fittings. New filter plugged into existing supply, one thing I found out the 5/16” line is the supply to the filter (PN BF1170), fuel filter to rail supply (PN RUS611203), fuel line (RUS632093), fuel line to supply side of rail (PN RUS611203), return side of rail to fuel line (PN RUS611253), more of the same line, fuel return to factory hose (PN RUS640940). That should cover it, I hope
Air Intake -$95.50
EBay, I bought a generic metal intake from a 2002 Silverado 2500, then had to buy Spectre 8131 filter, Spectre 9709 4” dia by 4” long pipe, and a 4” coupler with new hose clamps, but could have used the ones from the old intake. Then I cut off the mounting brackets from the intake to make it fit. The extra pipe and coupler were to clear the alternator. Surprisingly it fit really well in the end.
Belt-$28.32
Oreillys, I used K061120, which is a 6 rib 112” belt, I may have swapped a couple of pulleys from my stock for ones with good bearings so this belt may not be perfect, but it’ll get you in the ball park.
Power Steering Lines-$73.42
EBay, The fitting from the power steering pump to adapt to -6 AN (PN RUS648060), AN to hose fitting (PN RUS610025), Braided stainless hose (PN RUS632060) (I bought more than I needed and have enough to do 2 or 3 more if needed, you only need 2’ tops), hose to AN 90° (PN RUS610165), and finely AN 90° to the steering box (PN RUS648080). I also had to plug the return on the pump that used to come from the hydroboost brakes.
Power Steering Pump Pulley-$31.95
Oreillys, this pulley will work without shimming the pump back, but it really close to being bottomed out, Dorman PN 300-202.
Steering Shaft-$24.98
EBay, I picked one up from a 99-04 Jeep Grand Cherokee, I had to do some cutting and welding to make it all work, I’m still using the factory rag joint which I’m not a fan up but it works for me, I’d recommend digging a little deeper into this elsewhere to find a better fit.
That is all, I have a grand total of $7,188.47 into the swap, I didn’t list some repair items I bought like water pump, trans seal, power steering pump now, etc. But that is really up to the builder if they want to do it or not. You could save around $1,300 by not getting AC, and doing a few other things different and still end up with the same basic truck. Of course if you already have the truck and engine and trans you can save even more. Good luck and if you have any questions feel free to ask.
JB