if you have access to a timing gun then make sure its set at 12degrees advanced with the vacuum off...also i see your running the engine in? engine shouldnt have the chance to pink...shouldnt be driving above 3k rpm any way?

would double check the timing and make sure its on 12 deg adv with vacuum off...its the standard figure for RST's...when the engine is run in and if you have a aftermarket cam then ask the person who sets it up to dial it in properly for u

bassboy