~450hp from stock stroke 340?

My engine has some much lighter custom race-tec pistons and K1 rods which are also lighter. You have to get the rotating weight down to make the power. My camshaft is similar. 9.8:1 CR and Edelbrocks with a valve job and IIRC some minor blending. When it was dyno'd it had a 750 Annular DP and the air gap but I have multiport EFI and an Edelbrock Super Victor now.

To some people it might be a bit rowdy for the street with the carb, the multi-port EFI made it pretty tame though it still lopes a little at idle. Can easily drive up a hill at 1400 rpm in 6th gear. I get ~15 mpg most of the time now.