V8 swap? Or turbo slant six?

1/2 the price to build up a 318 than a slant, even with a core motor and trans. 318 headers, 119 bucks new..slant headers 300. Good 318 4 intake, 70 bucks..clifford intake..300. Camshafts...about half price. If you like to fabricate stuff, turbo it, otherwise just change the rear out to a 3.31 or something mid 3's.and replace the 1 7/8 headpipe to a super six 2.5 incher and itll be a whole new car driving.