Ok to make a long story short the 402 in my car spun a rod bearing. I guess it had more miles then I thought on it. So I ended up getting a killer deal on another 402 with a ton of parts. This ones a fresh rebuild with .40 over pistons. I was looking for a 454 but I got a deal I couldn't pass up. Anyway the motor came with 2 sets of heads. The first set are peanut port 14081045 heads. They are freshly redone but I know they aren't good for performance so there out. The next set are 3931063 heads which look to have low miles on them and I also have the heads off my old motor which are 3964290 heads. So my question is which heads do I use? The 290's or 063's? The car sees the dragstrip a good bit but never sees over 6500 rpm which is why I have oval ports. I'm using a solid comp 282s cam (244/252 dur @.50 and .590/.598 lift). It's got a weiand stealth intake and Holley 750 dp. It's also got a 3500 converter and 4:10 gears.