1/4 mile times
Wow guys want help we stomp him some sorry if we are all to hard for the most part.
We just want what is best for you big guy!
On gearing figure out what your redline is, determine peak torque/HP overlap were it is stil lpulling hard ( point like shifting from 1-2 etc). Then figure this RPM minus maybe 500 for your trap RPM in the 1/4.
I think there is a tool someone can post to make it easy with tires, gears and then plug in that RPM.
But as many said, get it tuned real good carb & ignition. Right there you should get at least .3.-.5 faster in the 1/4. i think a 750 for a big block is a bit small, but all you will need a better convertor and gearing, I say convertor 1st for the better 60 and you need to tell the folks you get it from what gearing you will end up with.
As others said, it is about messing parts, balance etc. If you have the $$s get the convertor and gears in as a package, tune the engine very well and then see how she runs. After al lthat you should get close to mid low 12s easy unless that cam is way late...
good luck, keep us posted on your success buddy!:)