Stock 340 dyno tests?

All I will add is I ran 14.20’s with my stock 1972 (340) 4 speed duster with 3.91 gears. Self tuned by a 19 year old punk. Suck azz street tires

Back in early 1970 my '69 340 Swinger, Torqueflite, open 3.23 gears, Goodyear Polyglass tires ran 14.28 @ 98+ mph at OCIR running G/Pure Stock.
I loved beating big-blocks on the street. They could beat me in a full quarter mile but the combo of quick-revving and light weight would get them stoplight to stoplight.