The motor is a stock 460 that still has the cast iron manifold. The manifold is rusting bad, so I would like to run an aluminum one or I'll stick with the ol cast iron style if someone has one that's not to beat up. I'm not sure what year the motor is all I know is that the boat is a 1976 and the motor is a Harmon marine motor. Ralph?


Thanks
the beav

i think i have an old dooe/cj manifold at my dads, i will check this weekend. you can have it for free

want me to make you one?

The old cast iron manifolds on those marine motors were cobra jet manifolds and other than the weight were really good manifolds!

Media blasting is your friend here if you are on a budget.  $30 vs. $150      I'm just sayin' .  .  .

I kinda hafta mention this Marc. The "Marine Cobra Jet" intake was designed to work on CJ heads only. Yes, it fits, but way oversized for 90% of the heads out there. The Torker was designed for the mainstream of heads out there, and their port sizes, and tuned to.  I guarantee you, that Cobra Jet intake's ports were WAY oversized for the intake ports on your heads at the time. Prove me wrong. 

There's a delicate balance sometimes between efficency and velocity. This is why port matching is so important. It affects both. I have 4 of those "cobra jet" intakes, and come get 'em if you want 'em, but understand, that is late 60's thinking.

Newer aluminum intakes offer far more than port size. Port size only really matters on cylinder heads, and on intakes when they can't keep up with the heads. Take your intake gaskets, have the head's intake ports matched to them, and do the same with your intake manifold, all will be good.

Ray

There's a delicate balance sometimes between efficency and velocity. This is why port matching is so important. It affects both.

Ray

Says the guy running a tunnell ram and dual carbs on a pretty stock motor!

beav, if appearance is the issue then take off the maniflold have it bead/sand/media blasted and re avaluate.

the manifold i have has been sitting outside for the better part of 5 years and you would have to do it anyway.

is the inside flaking on any of the manifolds? i can fix the outsides but its the interior that scares me.


The Beav

Says the guy running a tunnell ram and dual carbs on a pretty stock motor!

Ummmm Yeah, stock it is Marc, so sayeth you, so must be true!  Whatever