Hello All, I am now at the end of my drivetrain upgrade. I’m sporting a 327-cid, 3.58 stroke Y-block with around 400hp and C4 w/2000 stall converter. I am now considering a ’57 Thunderbird rear axle with 28-spline 3.1 gears vs Currie 9” with all the bells and whistles and 3.25 gears.

The 3.25 ratio and True-Trac is desirable, but is it worth $3k more.

All opinions wanted…

Thanks!




.150 Stroked Y-Block:327.25 ci @ >1hp per ci