Thanks, Don; the crane was a fun project, one of my larger welding projects recently.
I've had the body on and off a half-dozen times already, the Brookville body is dimensionally accurate; the fiberglass body wasn't. The back of the steel body dropped right in, perfectly centered with 7-7/8" from the inner wheelwell to the center of the tires. The front was another story. I had to open it up 2-1/2" to get it to fit, the brass cowl brackets were an inch outside the frame (which was initially fabbed to fit the glass body.) So, long story short, I broke out a fresh batch of 4-1/2' cutting wheels and the M12 Hackzall and cut my 1-1/2" square center crossmember loose on each side where it was welded to the boxed frame. Also cut the plate frame gussets loose, and built a heavy duty spreader out of 1-1/2" heavy wall square tubing, with back to back 1" and 1-1/4" jack bolts to widen the frame at the cowl by 2-1/2". It took my 15" Crescent wrench and a piece of 1"x2" rectangular tube as a cheater to force the frame out to where it needed to go. It really did not want to move that far.
When I finally got it where i wanted it, I welded in 1-1/4" long extension stubs on each end of the center crossmember and spliced the plate gussets to fit. By cutting it loose on the ends, all my other mounts/holes stay on center and aren't affected by the movement. (seats, e-brake, etc)
It did close up about 1/4" when I released the spreader, but it fits the frame really well on both sides so I decided to leave well enough alone. Did end up moving the two brass cowl bracket holes out half a bolt diameter, now the bolts drop right in.

I marked the body holes on the frame with a paint marker, then drilled 3/4" diameter holes with a step drill so I could weld in 7/16" Grade 5 nuts flush with the top of the frame to secure the body- in 16 places..I used 7/16" because they were easier to weld in than 3/8"...and because i wasn';t paying attention to the Brookville body which had 7/16" holes for 3/8" bolts. Had to open them all up to 1/2"+ to get everything lined up, but it fits well, with just enough clearance I don't have to struggle getting the body bolted down.
More to come...