:Which ones?The Holley's are already 2.02/1.60,the World Products heads I'm looking at are supposed to be already ported as well.My tunnel port heads are gonna be left alone.I'll just have someone go through them,if I can find someone that knows anything about them and won't charge me an arm and a leg to do it.I do not know much about the tunnel ports except they require a lot of rpm. I would use the either of the other heads. If compression is not a concern, I'd try to maintain at least 12:1 and put in a pretty snappy solid. Keeping in mind that you plan to run nitrous and the heads are adequately ported, I'd run a cam somewhere in the neighborhood of .600" lift mid-250@.050 intake duration and high-250 to low-260 @ .050 duration on the exhaust and keep the lobe centers around 110. If you run a stroker 302, I'd probably bump the duration up 6-8 degrees (take advantage of the bigger lungs) and widen the lobe centers to about 112.
You can run nitrous on 12:1 with no problem. You would have to run race fuel to curb detonation. The motor cannot detonate on nitrous. On the street you could get away with at worst 50/50 mix of pump gas/race gas and could get away with a 70/30 ratio.
Just my opinion as I have been through this a few times.
