Factory 68-71 340 puts 325HP on GM Dyno

So 3400-3500# A bodies were running in the 104 range in the 1/4 back in the day, off the lot? Few, if any ran 100mph.

There's a reason lots of those 350hp GM cars got killed by 275hp mopars, it's a little of one being aggressive and other meek with hp ratings.

Even today, XE268H cammed, stock headed 340's with a better intake, carb and headers are really making 330ish.

I'll Dulcich credit on this one, the stock rating he got in one article regarding a 69-70 340 engine was just about spot on for HP.