Is that pot-metal? Can that be welded?
BTW, here is the patent with drawings for the Vari-Slo:
https://docs.google.com/viewer?url=patentimages.storage.googleapis.com/pdfs/US2666332.pdf
6/8/2016
The question now is... how do you take this thing apart? I dont' see clips or set screws. Is it just pressed together? I need to take the bent arm off so I can get it repaired.
That top bar, the pulley link, can come off first. You have to be very careful to remove it from both pulley shafts simultaneously... a fraction of an inch from the left shaft and then a fraction of an inch from the right shaft. You may need some kind of puller... a battery post puller perhaps. After that, it's pretty easy to disassemble the rest.
Optionally, you can loosen the set-screws from the lower bracket holding the shafts and using a punch, knock out the shafts together as above.
If you plan on taking the unit completely apart, note that the pivot groove pins are very slightly tapered. You will see marks on one end of each pin. Knock out the pins from the unmarked end and note which side they are to be re-installed. Also note the location of the washers. IIRC there are three.
There may also be a couple star/press-on fasteners that secure the control arm to the head casting and your bent control link. These can be removed rather easily with a small pick and can be reused.
Vari-Slo owner's manuals are available online. :
One more thing... because you will be taking this apart, I suggest that you install new belts. A couple years ago, I auctioned a VS where I had installed new v-belts. I ordered standard v-belts from
www.vbelts4less.com. The part numbers were A15, A18, and A19, but I thought they were rather stiff. Some may suggest linked belts, but I prefer cogged belts on my drill presses. vbelts4less does not have cogged belts in those smaller sizes. l DID recently find those cogged belts at
www.vbeltsupply.com . The part numbers are AX15, AX18, and AX19, AND they are very inexpensive. Shipping will likely be more than the belts.