low compression

I am running a stock '81 318 bottom end in a '70 dart. Built it just for fun. Nothing fancy just a .450" [email protected] cam. I ported the hell out of the stock '81 heads with the stock valves. Performer 318/360 port matched with a big TQ off a '74 440. Stock electronic ignition and A-body 318 exhaust manifolds. The car is fun to drive, runs great on the cheap gas. Need to get it down to the track and get some timeslips before I install some cheap headers.