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Re: Transmission swap question
You may not need to change the tail housing or anything else so long at it is a '96-97 from a Vortec V8 truck. All the V8 trucks should have had the full compliment 3-4 (direct) clutch stack and full width 2-4 band with the appropriate band servo piston. The only question may be the rear mount on the tail housing, but I believe the housings were all machined with all the necessary holes.
The main reasons to go with a '96+ are that the some solenoid resistances changed after the '95 model year from 10Ω to something closer to 35Ω. Your vehicle PCM will be expecting that. The 3-2 downshift solenoid and valve were changed so earlier 4L60s are incompatible with your PCM. The VSS also changed sides in '96.
You'll also want to use the converter designed for your car and not a (probably) higher stall truck converter.
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