Doing a 180 on my 66-Valiant project...

Doing a 180 on my 66-Valiant project...

I'm going straight axle for sure, just need to cut 5.5"s out of the A-100 straight axle and come up with some shorter springs... I've figured out my wheel combo, only delima I'm having is tunnel ram with 2-4's or 68 dart/cuda hemi scoop.. Which would be most era correct???