for the rear gears, you need to figure out what the rear tire hight will be. taller the tire the lower (numaricly higher) the gear you will want to run. if you plan on having a second set of slicks or drag radials for the track then get them so they are shorter than you street tires. that will be like running lower gears. on your carb is easy to go to big. i cant belive how many people say run a big carb on a 302. check this calulator out http://www.gtsparkplugs.com/CarbCFMCalc.html it says a 461 is the ideal cfm for what you described. so even a 600 cfm will be a little big for your 302. recently ive worked on several cars with afr heads. they really perform well compared to edebrocks. the 165s will give you the best street performance. if you choose the right cam you should have a real strong street motor that will have enough lowend to perform well with 3.25.
the best people to talk about what cam to use are the cam manifactures. the more info you can give them the beter cam they can recomend. the one that asks you the most questions should be the one that will get you the best cam for your car.
I agree. Buddy Rawls is very good at this, for about 50.00 (thats what it was a couple years ago anyways) he will spec you out a off the shelf cam and spring package to best suit your needs. Or custom build you a cam for your application. Well worth the money in my opinion, best bang for buck
Just my personal experience a 750 vacuum seconday will work great but my combo was a little different. If it cant pull the secondaries open all the way it wont and the larger primary will be more responsive in the 60ft. Not to mention if he does go with more engine later hes got plenty of carb.
Smaller carbs are more responsive to throttle than large ones. It takes less air to pull fuel through the primaries if they are small than if they are large. A 600 cfm is more than you need for a 302 at 6200 rpm but it is within the acceptable range.
