Features gearbox suggestions please

Hi All i need some advise on what gearbox would be best to use behind a small block chevy motor it's a 383 cid stroker 420 HP
it's to go in the Buick that we are rebuilding
also what axle ratio ? info would be good
we are thinking of buying the engine from summit but any other suggestion's would be most welcome (

Bobby

 

You don't mention what year and model Buick, but I ran a 700r4 with a 9" 4.11 with Auburn unit behind my last 383 cu in sbc stroker (440hp). That was in a 31 A coupe with full fenders, and it worked perfectly.

 

I have a 700R4 and 3.50 Detroit Locker with a 28" tire in my OT ride with close to 400 hp and it works great.

 

I have a Saginaw 4 speed in mine with a small horsepower V8. With your engine you should consider a Muncie 4 speed transmission. Ratio for the final drive revolves around tire size and what kind of rpm you'll want at highway speeds among other things. The Muncie comes with different ratios (wide and close). If you're more drag race oriented prolly a 4:11 gear in the rear. Many options there.