joe and I been talking a lot recently and seeing what good options for my combo will be along with a few other guys.... I wanna do this one time, if I make 650 then so be it, but wanna make sure it's all right and matched....

Take the heads to billy Tim. Ask him to have his dad take them to be flowed.
If it was my stuff, I'd have billy set up the valve springs and check everything out.

Are those heads "as cast"?

That was an AWESOME vid ICDEDPPLL! thanks for sharing...........nice to see the view from under the hatch for once

the heads as far as ports are, the rest was done last summer to make them right, they had many issues.... all new valves, grinds, springs were ok, retainers, keepers and guides all new....

Is that a bazooka bass tube mounted to the front of the starboard engine? Or a rocket launcher?

Dude u r really messing me up with ur avatars lately ...is this the end?

Good luck on your engine build wish I had some advice, learning myself.

Sweet video ICDEDPPL!

My 509 dynod at 684hp at 6200...it did have very good heads though. I think he could make 700 at 6000 but I do not see a problem spinning it higher.

Well, you need to determine what average piston velocity you're willing to live with and build to that standard. Nascar and F1 engines, IIRC, both have similar piston speeds but note the RPM difference.

I know a decent amount, but advice and questions should always be asked! Never hurts to learn more!!