Hey guys I was looking into getting a closed cooling system for my 95 formula 280SS with twin 350's. I was wondering if any of you bought a aftermarket system before because I noticed that there was a lot of company's that make them but i don't know who to trust. I would hate to get one and have it crap out on me. Any feed back would be great thanks a lot.

ttt

Go to donzi.net Theirs a bunch of guys over their using them and they have allot of info for you..

I installed the Seakamp system on my 1986 Wellcraft Nova II with 350's, alpha drives. Works perfect. Temp is stable, always 180F. It is the Full system, ie Also the exhaust manifolds cooled by closed loop. Relatively simple installation.

Seakamp or SanJuan kits. Easy to install (Engine out of the boat), no issues. Made in the USA

ttt

I purchased a Monitor brand kit for my 454 build and it has been flawless. Great product.

I used aluminum Merc 496 manifolds and made the system a FULL FWC system (block, and manifolds).

496 manifolds bolt right onto a 454?

yep.