LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Valve covers

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Old Nov 17, 2008 | 12:08 PM
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Default Valve covers

Did anyone have any issues with the Canton valve covers and Pro-Mag 1.6rr's? clearance issues?
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Old Nov 17, 2008 | 12:23 PM
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Pretty sure they don't fit.
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Old Nov 17, 2008 | 02:10 PM
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I have heard you need to grind out that notch for the alternator a little to get them to fit with those rockers.
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Old Nov 17, 2008 | 04:43 PM
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I had to do some very slight grinding on the inside of the passenger cover to clear the first rocker. We're talking about 1/16" maybe. Other than that, no issues at all. Did you get the LT1-specific ones with the alternator notch or the SBC ones?

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Old Nov 17, 2008 | 04:52 PM
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Kyle

I'm ordering the LT1-specific ones I wanted to put a breather on both sides but I think that may cause a vacum problem if I do so I may not do that.

PS: loved your car in GMHT cool! You need to come to White Sands and make mine that pretty.
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Old Nov 17, 2008 | 05:07 PM
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A little work with a hammer took care of mine.
The affected area down behind the alt, you can't even see it.
No clearance issues at all with the alt.

The rubber VC gaskets didn't seal very well though, I ended up using cork ones instead.
They held their shape and stayed put when I installed the covers on both sides.

I used a breather, but it was sealed so that it vented to a 1/2" hose, which I plugged into the TB.
That should prevent issues with "unmetered air" while preserving the vacuum.
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Old Nov 17, 2008 | 05:12 PM
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That's just it I don't want to run a line to the TB I removed the vac line from my current V-covers, sealed off the TB and ran a Moroso breather in the covers so far.
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Old Nov 18, 2008 | 08:53 AM
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Originally Posted by Ponch95
Kyle

I'm ordering the LT1-specific ones I wanted to put a breather on both sides but I think that may cause a vacum problem if I do so I may not do that.

PS: loved your car in GMHT cool! You need to come to White Sands and make mine that pretty.
Thanks Ponch! I love White Sands. Haven't been there since about 5 years ago. I don't think you'll have any issues. Just use cork gaskets like James said. I did the same.
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