I have posted this before but to answer the capabilities of a street legal 1965 Plymouth Valiant 273 in the period 1975-1980 in my case was a best ET of 12.72 @ 108 mph.
I built the motor at my Community College auto technology class:
All bearing and piston ring clearances set to maximum allowable factory specifications. Reciprocating assembly balanced.
stock block bored .060 over to 282 CID with deck surfaces cleaned up by machining.
stock connecting rods (beams polished, shot-peened, aftermarket rod bolts)
Vehicle weighed 2960#
One brief water burnout in second gear.
Clutched engaged at green light at 6000 RPM, full power shifts at 6000 RPM, trap 6400 RPM and still pulling strong past finish line.
