Which intake gaskets are you planning on using? FelPro runs the gammit from .06 to .125 thick.

 

if the heads were shaved, or the block was decked,
you will have to plane down the intake to match, the only problem is that you dont know what or if the heads or block have shaved off them.the guys at the local machine shop may be able to help you out . mikey

 

sounds like your using old tech. manifold on new tech. heads. Yes there are adapters..check jegs and summit.

good luck

 

Need to measure the gap so we know if it can be fixed by a diff. gasket.

Is the gap on the sides (heads) or on the bottom where it meets the block? There will always be a gap next to the block, which you fill either with rubber spacer gaskets or (most prefer) with silicone sealer

 

The comment on the milling,while that would be the correct if the heads/block were milled, this is obviously not the case. If it had been decked/surfaced, there wouldn't be a gap. Plus, taking metal off has never closed a gap it only makes it wider.

 

thanks for your replys guys, now that I,ve looked at it further the intake does actually line up with the heads, but these heads (which are off the shelf) are factory ported by GM. The intake ports are much larger than stock. when I put the intake on, the ports almost go past the top of the mating area between the heads and intake. the best I can get everything lined up with gaskets that have extra material makes it so that at the top of the port I have something like 1/16" of mating surface. anyone have any ideas? or should I just go with the GM performance parts intake they recomend?

 

hey wood , if you take off the top of the block,it lowers the heads,thus widening the gap between heads and intake. by shaving the same off the bottom of the intake manifold, it fits back down in the gap. see i splained it to ya,mikey

 

I was a machinist for years mikey and if you mill the top of the block you NARROW the gap. ( I'll try to explain),if you look at the front of a block and you consider the distance that the bottom of the intake manifold sets on is say 8" (for instance) and you mill say .030 off either side you now have a narrower distance than before by the amount (in relation to the angle) that you have just milled and the intake will not fit down into it (not....leave a gap) and that's why the manifold needs milled (on all surfaces, if you just milled the bottom it still wouldn't fit down between the V). There mikey ,I'VE explained it,whether you comprehend is yet to be seen. Usually the first indication of milled heads/block are bolt holes that don't line up,which he stated did, so I think the spacer suggestions regarding new tech/old tech are probably right on the money.

[ May 01, 2003: Message edited by: woodz428 ]</p>

 

Cheaper and wiser to get the GM intake.

 

Originally posted by big455:
<strong>I put the fast burn aluminum heads on it. </strong><hr></blockquote>
tell what those heads are like i'm thinking about a set of those for my long rod 350 i plan to biuld <img src="graemlins/pimp.gif" border="0" alt="[pimp]" />

 

I found out that it won't fit because its a vortech style head. but this still makes me wonder then why are there both stlye of mounting holes in the heads. too bad ,I really always wanted to run that intake on something. thanks everyone.

 

so woods ,the only thing that changes is that the bolt holes slide, (for lack of proper language)down vertically to mis-align.therefore the angles are the same before and after just the height changed.i'm a carpenter by trade and barely a novice at engines. did i get that right???mikey p.s/ thanks for the splainin i really like to learn this stuff, guys like you are a real help to clear the mud..

 

Remember that all GM engines made in the last 20 years have not used intake manifold end seals.Fit the intake onto th blck without sals.If it still doesnt fit well,look at the gasket surfaces.If the surfaces are parallel but just arent close together you can buy thicker intake gaskets.As a word of advice,I would run the correct vortec intake on those heads.You wont realise the full potential of those heads until you have a match on the port roof.Good luck.

 

I`m running a pair of Vortec heads on an older model bottom end and have a Team G Nascar style intake (old bolt pattern)... The heads have been modded properly to accept this manifold and the ports match in height perfectly but had to modify the heads (port match) to the intake which was more square in the port area... Then ran into the problem of a large gap between the heads and intake... Solution... Felpro .120" large port intake gaskets and used the cork/rubber end pieces with sticky stuff on them in a doubled fashion (stacked together on each end...) and used Permatex "Right Stuff" to seal it all up... This setup works extremely well... A little care with the install and you get no problems and plenty of HP...

[ May 06, 2003: Message edited by: Bartman39 ]</p>