Quote:
Originally Posted by Mkelcy
There are two "standard" older T56's for Chevy's - the LT1 T56 and the LS1/Magnum T56. The LT1 T56's have about a 5.5" input shaft - engine to bell housing to bell housing to transmission mounting surface; the LS1/Magnum's have about a 6.5" input shaft measured the same way. The Magnum should bolt right up to an LSx engine with the right bell housing and pilot bushing.
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You are correct. The lt-1 t56 will bolt up to a sbc, or a bbc, with no problems.
The LS-1 t56 won't bolt up to a sbc, so I'm guessing the op has a t56 magnum built for a sbc/bbc application, which as you stated, has a shorter input shaft. I know that I had to convert mine over.