[KEN KAYE]

I HAVE A 66 CHEVELLE WORK IN PROGRESS, I'M CURRENTLY PUTTING IN A 383 STROKER 480HP/465 LBS TORQUE WITH A M-21 MUNCIE 4 SPEED. THE CAR CURRENTLY HAS A 10 BOLT WHICH I WANT TO REPLACE WITH A 12 BOLT POSI W/3.73 OR 4.11 GEARS. DO YOU THINK THATS TO STEEP, THE CAR WILL BE MAINLY STREET/SHOW WITH A COUPLE RUNS ON THE STRIP.
THANKS KEN KAYE

 

[advanced design]

Match the gears to the rpm powerband
of the cam you are using and the speeds you will be cruising in. If you have a higher rpm powerband go with the 4.11's.

If you plan on highway cruising go for the 3.73's.

And enjoy the ride!