Originally Posted by Justalilow
If the 400 Pontiac BB is the same bolt pattern as a SBC or BBC then an LT1 T56 will work. I have a 94 LT1 T56 bolted up to a 69 SBC. The only problem you might have is finding a clutch and flywheel to work.
which clutch and flywheel did you use with your 69 sbc?