j heads..more perf. questions

RPM, not sure if your interested but your set up sounds alot like mine...I am running a 60 over 360 with completely stock bottom end, windage tray, true roller chain, tensioner, lunati cam, (450/475 i believe), 750 edie carb, rpm manifold, spitfire headers into duals with no crossover 8 3/4 posi 3.23 gears. This is in my 63 dart.
I'm not sure of the weight of your vehicle but, I just recently upgraded from a 318 to my 360, with the 318 my car ran good and could get a little tire spinning going on. Now that I have most of the bugs worked out of my 360 it will just about burn the tires off if I want it to. I know that tire spin isn't a good measure of performance but, it sure is fun......if you want I would be willing to discuss your setup with you and see if maybe there's something that your missing. I always feel that two heads are better than one when it comes to trying to figure stuff out. I am by no means an expert but, I have asked alot of questions here on the forum and learned quite a bit. If you want send me a pm with your number or just pm me to send mine to you. I know how frustrating this can be at times, I was expecting instant gratification from my swap to the 360. When it didn't happen I immediatly wanted to blame something in the engine build. After talking to several people here I started getting really good results with the things they told me to look at. I also learned not to overlook the little things......they all add up.