Originally Posted by Moose2
I found a 700R4 transmission for sale on Craigslist and the seller says it is from a half-ton 2-wheel drive pickup with a six cylinder engine. He got the tranny long after it was removed from the truck so he tells me he doesn't know what year the truck was. Can someone tell me if the bellhousing bolt pattern on this 700R4 will mate to my late seventies 350 (Chev)???
The 700R4 came with one of two bellhousings, the standard Chevy bolt pattern and the narrow GM Metric pattern first used on the 60 degree V6 motors. If yours came from a full size truck, it's certainly the Chevy pattern. If it came from an S-10, it could be either, since the 2.8 used the small pattern and the 4.3 used the Chevy pattern. Should be pretty easy to tell just by looking at the bellhousing - the Chevy pattern has a point at the top.