Don't know for sure did the count the revolutions thing and it came out to something like 3.5:1. It's a 530hp big block street machine. I drive it everyday. Just looking to maybe get a little better mpg and performance
3.42 would be perfect with a 700R4 OD trans with your 530HP bbc that has plenty of trq for that gear & they will also be enough gear for decent strip perf too as long as cam wasn't too lrg/too much duration.
Heck,i have seen guys with fairly hot bbc street/strip cars running low 11's to high 10's with 3.31's.
But it also depends o n what you want,is reasonable over the road cruise rpm more important ,is strip perf more imoprtant to you,or is best comprimise between resonable cruise rpm and strip perf most improtant?
I think 3.42 with a 700R4 (esp with lockup set to engage at higher cruise speed like 45-50mph) would give you good over the road cruise rpm & fuel mileage vs decent strip perf with your bbc.
BTW,could consider a 200-4R that can also be built storng enough for your bbc that has better gear ratio steps from gear to gear if your serious about strip perf that i think can be setup to lock coverter at WOT but i am not 100% sure of that.