Are Speedmaster Heads Good? I've Heard a Lot of Bad Press on Edelbrock 340 Heads Lately

toolmanmike said
That's a nice improvement.
Fun video.

No, thats an amazing improvement from a head swap, at that performance point! 50 hp maybe. 75 maybe too.

Edit: Wallace says a 500hp/3000lb/7.07 goes to 600hp/3000lbs/6.65.
If you got that JUST from a head swap... those speedmasters must have been garbage!