I am close to doing an engine swap on my 68 302. I want to get a roller 5.0 H.O. from a 85-92 mustang because they come with forged pistons and they have roller lifters etc. What benefits do the later year 5.0 have over the older 302's? Is it worth buying a core 5.0 motor? Can I have the 302 rebuilt and be just as good or better than a 5.0 H.O.?