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We are in need of in a bad way a square/rectangle port cast iorn big block chevrolet intake. if such a beast exists i have been told that they came out in 67 and 68 chevelles, i have also been told that there is a way that you can cut up an oval port intake and make it square. any help at all is much appreciated!
i have never seen a iron rec port intake.. all gm i seen were alum .i not saying they never did but if so its very rare.... you could do some work to a iron O port but why??? if you need it to be iron for a class just send out a alum intake and get it metal sprayed with steel :)
Pat thanks for the reply, tell me more about this metal spraying like how its done and price, allso who provides the service is it something i have to send off or something thats done localy? thanks
guys spray all types of metal s any shop that builds up shafts and plates etc that are hurt by rust. worn or over machined or to added a better metal on a part for wear .or rust look in the yellow pages under thermal spraying or metallizing i only seen it done one time. not to good to be around when its being put on.but i have had things done they use air a gass and wire that looks like a spray gun that use a electric charge the metal comes out like hot sparks.there is a shop here mi that will do the job
how can i cut up the round port to fit the square port heads?..... whe have just found out that thats our only option:(
You don't need to cut it up--just run it--you will just have some terrific anti reversion at the manifold--really helps with big cam, low rpm and too small exhaust
find a set of re worked O ports your never going to seal it up??????????????????? the O port intake is smaller then a stock rec port head less you do some welding on the O port intake and start cutting it out .i could make it work but you would not like the price
even if price wasnt an option i still need a stock appearing intake atleast from the top is there any way that i can put a thin shim in between the two to cover the square ports above the intake?
I don't remember exactly which manifold or heads it was but I did do one for a customer about 30 years ago that had the same type issues----it HAD TO BE THIS MANIFOLD---and it works---it probably was off one of the higher hp 396/427 at the time but it was cast iron and oval port
i done the rec port intake on the o ports heads with rec port gaskets .not realy sure there is that much iron around the o port to seal the top of the rec port heads? hard to say have to check with a rec port gasket up on the o port intake
Why does it have to be cast iron ? Can you use an GM aluminum intake.
BradC