Heads are on a 496 stroker motor (Gen IV tall deck) built by Obnoxious001 (Barry) on this board. Guesstimating 550hp, maybe more. I still need to top it off with a Demon carb and polished/fabricated sheet metal valve covers. I have matching Candy red Lightnings. Going in my 95' Hallett 210.
If you're patient, you'll find good deals. You might look thru old ads on OSO - that's how I found the Marine Machine system, the ad was actually about 6 months old but the guy still had the stuff. There were some other systems on there a few months ago.
WPM/Marine Machine/Latham, recommended by CP Performance over any other systems. I saw Imco stuff coming up pretty regularly on Ebay. In fact there was a brand new, complete two ram add on system for $1400 that nobody bid on. :cry:
http://www.***boat.com/image_center/.../1132496-2.jpg
That looks very nice.
I don't think I'am doing anything to my motor right now. It's a HP500EFI with only 345 hrs, so I might go a 4th season before I freshen her up. Or wake her up.