[ol_skool_chevy]

In my mind it does not matter if your using a SBC unless your talking about how strong the trans is and the Propose its being used and the weight of the truck your putting it in.
Some might say the 3 speed is not a very strong trans. I would have to agree. But if you only using it for daily driver it should be a nice little around town trans.
No groves is the 2.85 1.68 1.00 trans.
Its will be some what faster to start off then say the 2.54 1.50 1.00 but in the end they all are 1:1 on the Hwy. I would say with a 3.72 read end it would be nice