Engine swap

When you say without mods, do you mean none? I wouldn't do it without upgrading the front drums to disc including new dual master cylinder, you"ll need a v-8 904, v-8 centerlink, upgraded shocks and torsion bars, exhaust, better rearend, that is unless you just plan on looking at it and not really driving it hard at all.

On the other hand, except for the different trans and center link, I'd argue you should do all of these if you plan on driving it hard whether you're swapping in a V8 or not. :) A-bodies were designed to ride on the slippery tires of the time and respond very well to chassis mods to let them use the grip you can get with modern tires.