421 HO block, going into a automatic rope drive car now so there will be some tunnel cutting on the 63 Tempest any way you choose. Question is where do I go when my rear starts at 4.90 ratio. I would guess that will be re-geared at some point when I learn I can't drive faster than 55 with out extreme RPMs. The options here are a Gear vendor overdrive for road use, behind a M21 trans, or go to the Tremec TKO 600. Car needs to be street-able so there this is not a pure race build.
Please don't puke up this thread.