If you are removing the TH350 with the long tailshaft housing, the 700/4L60 will go right in. Even uses the same slip yoke! I swapped in enough TH350s for these when they first came out to sink a canal barge!! They were suffering from the new design bugs that plagued many new transmissions back then and folks paid good money to go to the more reliable TH350. We swapped many into light pickups back then too.
For about three years, I spent ten hours a day under cars and trucks making these swaps and helping to R&D the new transmissions for the aftermarket industry. For a while, the brackets for the crossmember were still there on the frame of the GM cars and trucks to make the exchange even easier!!
The only thing required to swap in the 700/4L60 is to relocate the crossmember and shifter cable and replace the detent cable with the appropriate one. If you are replacing a short 350 or 'Glide or one of the 4spds your local driveshaft shop can shorten the shaft for "real cheap" and even the slip yoke can be reused.
If you're replacing a stick, (manual) tranny, you will, of course, have to find the appropriate replacement gear selector assy.
Last edited by Blackwater; 11/29/16 02:03 AM.
