Manual or automatic?

TT5.9mag said

There is one option to connect one to a big block. I’ve never used it, but do you not like it for some reason?

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There's a couple, neither is awesome.

Bolt on bell housing from Ultrabell, but six 5/16" fasteners is.... Scary. I've wondered about getting a big block bell welded on.

The adapter plates are ok, but they push the trans back and it's already snug on a BB A body. My biggest gripe is that they are clearly not factory.