1971 LT1 heads: are they any good - Hot Rod Forum : Hotrodders Bulletin Board
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Old 10-03-2006, 08:45 PM
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1971 LT1 heads: are they any good

I have a set of 1971 lt1 heads and want to know if they are high performance or are they plain janes. I will be using them with a closed loop tpi system i bought off ebay. Speed density

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Old 10-03-2006, 10:09 PM
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If the are indeed 1971 LT1 heads they can produce some decent HP. However if they require extensive machine work like valve seats, valve guides or surfacing, later model heads are a better option IMO. If you have to spend some serious change on them I would look to Chevy's later model heads.

Vince
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Old 10-03-2006, 10:14 PM
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Vince is correct ...

35 years ago ... those were the heads to have for a SBC ... but time and technology have made them only SO-SO ... now. There are lots of heads way better ... for little $$$.

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Old 10-03-2006, 11:13 PM
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Heads in good shape

The heads seem to be good. I pulled the motor out of a 72' blazer i had. The motor (the one I'm using now) ran great in the blazer with the Lt1 heads on it. It did not smoke. It was really cold natured. Ran strong enough to snatch second with 33's on it. I plan on doing some port matching and new seals while the heads are on the counter. Thanks for the reply
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Old 10-04-2006, 01:01 PM
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IF they are actually LT-1 heads from 1971, they are 76cc chambers, 2.02 intake, 1.60 exhaust, screw in studs with guide plates. They will not have camel humps like the 70 version.

The only real difference between the 1970 LT-1 370 HP engine and the 1971 LT-1 330 hp was the chamber size for compression reduction for emissions. If they are the small chamber with camel humps the are 1970 model heads and the seats need leaded fuel. Supposedly the 71's were unleaded friendly.
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