I have a '72 Mach CJ 4 Speed factory Hurst car. I like cruising with it. Considering swapping out toploader for a Tremec 5 speed. Original 351 CJ rebuilt with hydraulic roller cam and Keith Black pistons, also replaced open chamber heads with a pristine set of 1970 closed chamber. Engine dyno'd at 386hp and 392 fp torque with original intake and exhaust. Swappe d 373 taction locks for 355. Looking at going with hydraulic clutch as well. Any ideas on which Tremec to install and aproximate cost to do so. Thanks.