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

LT1 heads... will any year work on my '96?

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Old 02-20-2009, 12:04 PM
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Originally Posted by Hardtop94
trying to dump my stockers for 100 bucks seen them for more but dont know why you would pay more, i found a set of edelbrocks on craigslist complete for 500 thats a deal but they wont work for my setup, going to get a set of the patriot lt1 heads they look like a great buy with all they have
373's or 643's?
Old 02-20-2009, 12:05 PM
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any year lt1 head will fit on any other lt1 regardless of year
Old 02-20-2009, 12:06 PM
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Originally Posted by turbo4.8
any year lt1 head will fit on any other lt1 regardless of year
Understood, but there are better heads than others (for porting purposes), more specifically, ones with casting numbers that end in 374 or 643.
Old 02-20-2009, 01:24 PM
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i think mine are 643's stock 94 heads, i always head 94 had the better heads
Old 02-20-2009, 01:29 PM
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Originally Posted by Hardtop94
i think mine are 643's stock 94 heads, i always head 94 had the better heads
Some one posted that all '93 heads are 374 heads, which are also good.
Old 02-22-2009, 03:26 PM
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Originally Posted by impaled
as far as inspection goes, i obviously cant magnaflux them (aluminum), dont want to pay to get them pressure checked, which leads me to die penetrant to look for cracks. so where could i get some die pennetrant?

i dont want to blow $150-200 for heads that are cracked

if they are just a little warped my instructor will help me mill them as long as it doesnt send my compression beyond 93 octane.
I can send you a can of penetrate and developer for $20 paypal. Magnaflux Brand spot chek enough to do about 100 heads LOL 1 can of each. Send PM if interested
Old 02-25-2009, 09:42 AM
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i got the heads and intake manifold with all components on and injectors/rails (all three of which i dont need). the heads looked practically perfect with the exception of caarbon buildup which isnt a big deal.



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