hey everyone, is anyone out there running the edelbrock rec port marine heads on a hp500? any luck with them, durability? they come witout the spring setup, what did you use(springs,retainers,locks,shims)?thanks alot

Wondering about those heads myself...also have an hp500 (in a 22' Stoker). Anybody tried these heads??

they look like a good deal!

hey guys, edelbrock claims the marine version of the heads are hard anodized to protect the alum. , but no springs-retainers-locks-shims. hmmm,what to use?

I've used 'em on my 454/330 hp. last year.65 mph Bow Rider was pretty fast(22'Chaparral).They are a good deal.I bought them from Summit.Whoever supplies your cam will provide springs. Trying AFRs on my 540 project.BOB

Merc's new Hp525EFI uses them. They have a hard coating. But looks like you have to freshwater cool them. Wouldn't be suprised if there is a service bulletin on those heads getting cavation holes from the silicate in the antifreeze as it flows through the head.

I 'M ALSO THINKING OF THOSE HEADS OR THE REGULAR RPM PERFORMERS. i HAVE 420'S IN MY BOAT NOW(GM RECTANGLE PORTS) AND HAS ANYONE PULLED OFF THE REC. PORTS AND SWITCHED THEM WITH THE EDLEBROCS AND NOTICED A DIFFERANCE?

Between the GM rectangular and the Edelbrocks I doubt there would be much differance but from the 330 hp ovals I'll bet it would rock!!!