90 7.4L intake manifold
 

my intake manifold is getting a couple of little rust spots, so i take it that it is cast iron, or steel. Does anyone know of an aluminum intake that would be a direct replacement for the most part that would work with my rochester carb?

Re: 90 7.4L intake manifold
 

You could just glass bead and repaint your intake. I have two intakes and carbs off '89 454 Magnums that are in liike new condition. I believe they are aluminum, but I would have to check. I would sell cheap. Let me know if you are interested in one of them.

Re: 90 7.4L intake manifold
 

well, maybe, i was just trying to figure out if a company like edelbrock or something made a mild upgraded or stock replacement in aluminum. If i was to go through the trouble of pulling that intake off, i wouldn't want to put another steel one back on.

Re: 90 7.4L intake manifold
 

Ive got an Edelbrock performer that Im not using. rogue2800 (at) hotmail.com

Re: 90 7.4L intake manifold
 

would something like that work with my original carb, i'm pretty sure i have a rochester..... how would a mild upgraded intake effect fuel/air mixture, would i have to play with the carb settings or would they be fine as is??

Re: 90 7.4L intake manifold
 

Edelbrock makes a Performer that takes the spread bore carb.
I ran one on my 1989 330HP/7.4.
A K&N filter is also a nice upgrade.
My engine gained about 100rpm on top with these two additions... :drink:

Re: 90 7.4L intake manifold
 

Yes, mine is for the Quad. spreadbore.

Re: 90 7.4L intake manifold
 

how do i know if i have a "spread bore" I'm not sure what that means. I just know that i have a '90 7.4L merc, and i've been told that i have a rochester but i have never verified that

Re: 90 7.4L intake manifold
 

Might try to find a Merc aluminum intake with the brass lined water passages. Regular alum intakes will corrode at the gasket mating surfaces. Even in fresh water use.

Re: 90 7.4L intake manifold
 

There aren't too many intakes that match up well to the peanut port heads. Be careful with your selection or you will go slower!