Early 80's 360 driver

I think, if it was me, I'd change the oil pan and pickup (318 pass car will not work... you need a 360 passenger pan) and leave it alone until such time as you have the time, place, and money. A good runner is perfect. Get it so it can go right in, and run it. Stick the headers on it, if you want to upgrade the intake and carb, but don't break into it beyond that.