V8 swap info

You'll need different engine brackets and mounts,and
they say putting the exhaust on the engine,is the biggest PITA.
Then comes the carb hook-up, and KD linkage if going automatic.

I did that swap when I was a kid, 1973ish. I used a JY 340 with a 318 top-end and cam. And bought a complete 273/904 to steal parts off. I used the 904 and engine brackets off it. And Hooker fenderwell race headers were the only game in town. I converted the floor-mount gas-pedal/mechanical carb hook-up, to the later cable system. The slanty rad was just barely adequate. That was a pretty hot combo I thought,and remember it fondly. Traction was a serious issue,there was none
One of the Magnums should be pretty hot as well.
Happy HotRodding