I don’t know man. Him and I are about pushing the limits of stock heads and cams…there seems to be a serious wall to hit. I mean look at johns car…he literally has the best heads in the US custom cams, an an 86 and only made 604 on e85@28psi. I can’t see him making more than 520whp@30PSI. Then he will be seriously pushing the limits of stock rods. I can’t even believe that motor has lasted this long (if it’s still the one Dom had in it).