Is it true if you use aluminum heads with 10:1 comp. and you can still run pump gas and if you run cast iron heads you can't? I was thinking of getting arp rod bots insted of buying whole new rods to take up the horsepower. How mush power can stock 302 rods take. How much could they handle with arp rod bolts? This is my first rebuild so sorry for all the questions. I was just wanting a street rod to play around in I was just planning on buying a rebuild kit maybe some flat top pistons and a good rv came. I was just going to take my heads and get them worked on at a machine shop but I seen the heads on ebay and figured I could put a couple extra hundred dollars with the machine shop money and buy aluminum heads ready to bolt on. About how much horsepower would a 302 have withe flat top pistons and a good cam with some head work have? how much of a difference would roller rocers and lifters make in horsepower? Once again sorry for all the questions im just curious on my first rebuild im only fourteen. Thank all you guys for the help.