Engine Power

The 904 should hold up to it if it hasnt been beaten on over the years.

I would put in new pistons, Keith Black hypers are a good and cheap choice. The heads you can either have your cylinder heads worked on by a cylinder head guy or just buy a set of 302 heads (82 and up I believe). Have them cleaned up and do just a little work to them and bolt them on. Edelbrock Performer Intake with 650 carb. Also a CompCams hydraulic camshaft, they make a special type just for us Mopar guys using the stock valvetrain but I cant remember the name of them. You can reuse alot of original parts just as long as they arent broken, showing wear or stress and such. You can even use the original exhaust manifolds and just have them cleaned up. Go through the block and make sure you dont need any major machine work done to it. Possibly will need an over bore though.