[ERASER5]

I am looking at an 80 something Sub with a 454/700R4 drive train. I know the front cross member will swap with a 70 GMC, so will the BB motor mounts/stands swap too? Or do they need modded?

Second, after watching Drew's Frankenstein build, I wonder if the 80's HVAC unit could be shoehorned into a 70. What do you guys think? Aftermarket units are not an option. I need the fresh air intake for winter driving.