paul2748 (8/29/2015)
When I installed a top loader in my 54 (312) I used a small block unit and only had to trim about 3/8 of an inch. I am not sure on the length of the big block bit if it's shorted than that then you would have to make up a custom pilot bushing.
the tip of the small block input shaft measures 1 1/8 inches, big blocks are 3/4 of an inch, exactly 3/8 inch difference. that comes close enough to being perfect for me.
so how much material has to be removed from the bearing retainer? can the bellhousing be opened up enough to work? as long as the input shaft doesn't have to be modified, i kind of hate to modify the bearing retainer if i don't have to. that saves the opportunity of using the toploader beind an FE if the need arises.
i guess i should be asking these questions in the tech forum, but hey, this thread kind of morphed into this. i wouldn't need to ask these questions if i had access to the transmissions. they're in a storage container at my cousin's shop. i stopped by there today, and there seems to be a problem with the hinge. we didn't have time to solve that problem today. next week is the holiday, a car show the following week and upcoming shoulder surgery for my cousin in october, it might not be til spring that i can find all the answers for myself.