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Re: TH350 to 700R4 Help!!!
Yes, I've done the swap in a few vehicles, including '57 Bel Airs, '70-80s trucks, and '70s F-, G-, and A-Bodies. If you already had a lockup converter, the swap is even easier. Silicon outlined the hardware differences pretty thoroughly. The electrical connections are different, but the harness can be altered very easily to the newer style connector. The dipsticks are usually not a problem, although the F-bodies seem to have some dipstick tube clearance issues. I'm thinking your B-car will have plenty of room. The crossmember may require alteration (slotting or cutting/welding) and driveshaft spline count may be different depending upon years.
When you select a 700-R4, make sure it is a V-8 unit, and it would be better to get a 1987-later unit for some of the upgrades which were made across the years.
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