what auto od should i use?

[coggonobrien]

motor won't be anything crazy, just reliable. it's a large oval 396 out of a 69 caprice that still runs will and has had 0 machine work done to it. i will tear it down and if needs bored i may make a 427 out of it. other than that probably 10.0-1 compression, big mutha thumper cam, hei, either edelbroch or holley multiport, super comp headers. probably aiming for the 350-400 hp range.