273 commando HELP!!!

Running a comp. cams solid unit (20-246-4 http://store.summitracing.com/partdetail.asp?part=CCA-20-246-4&autoview=sku) in my 65 Valiant with 273 commando. Close to stock modern grind. Also have slightly ported the heads & port matched the stock intake & exhaust manifolds. Only other mod is enlarging bores on stock intake for modern eddy 600cfm carb. My bottom end is stock. With this combo and hi-po single exhuast this little sleeper will definately chirp second.

Oldschoolcuda