Torque Converters??

need more info.
gears,tire size and cam...are you racing this combo?
408 usually has lots of torque so a hi stall is likely unnecessary on the street

Magnum block 408
eddy heads w/ valve job now have the same spring pressures
Crane 1.6 ratio rockers
Comp cams 20-604-9; Duration @ 0.050 lift 210 int./220 exh. 0.512 int./0.512 exh. lift, and lobe seperation 112, hydraulic roller
Hughes Air Gap
Headers

Right now the 408 has the Jeep's, fuel injection in place, and is going to keep the fuel injection when it goes in the Cuda.

I'm not sure on tire, depends what will fit and how much of a mini tube I can do with the Fastback. 28" tire probably.

This is going to be a nice daily drive (believe it or not the Jeep is the race car, lol), probably a 3.32 gear, not sure if I want to go to a 2.94 or a 3.55 yet. But it should have plenty of torque to turn even a 2.94. Before the rebuild, I ran a best of 13.391 with it in the Jeep with stock 3.73 gears, a 31" tire, all-time 4-wheel drive. Jeep weights over 4100lbs.