Factory 68-71 340 puts 325HP on GM Dyno
Never had my '69 340 dyno'd but I can tell you my '69 Swinger 340 ran 14.28 @ 98+ mph pure stock with a 727 and non-Sure Grip 3.23 rearend. Plug that in your calculators and see what horsepower is required.
It surprised a bunch of big-block Chevelles on Whittier Blvd. back then.
