Slalom4me

From GMPartsDirect
From the 2004 GM Performance Parts Catalog:
"Big-Block V8 Cylinder Heads Quick Reference Chart" (pg 118)

• Part number: 6260482
• Casting Number: 6272990 or 14096188
• Notes: Used on LS-6 and LS-7. Open or closed chamber pistons.
  Originally produced 1968-71.

jakesindy - I am not disputing what appeared in the 1970 Corvette
brochure about the engine option. Nor am I disputing that you
had a 454 with O/C aluminum heads.

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bstbrgr

Every day was so exciting to find something new about the car and the owners. It was a beautiful journey and I made a lot of new friends through the forum and phone conversations. Thanks for enjoying the thread like ChiliPepperGarage said it should be made into a short movie or can be a great magazine article.

bstbrgr

You are correct the LS-7 is over the counter only, never in a production car and had cast iron heads only. Only the L-88,ZL-1 and the LS-6 had aluminum heads. I had a 1971 LS-6 corvette till just recently (pretty familiar with these cars and motors)

jakesindy

do your home work and get back to meHow many ls-6 chevelles did you ever see with aluminum heads. O Iorn head motor dumm AZZ

Slalom4me

Chevelle?

He said

There were 188 Corvettes built in 1971 w/ open chamber, aluminum
head, LS6 engines. In addition to bstbrgr, CF member Bill Dearborn also
owned a '71 LS6 Corvette w/ Al heads.

In 1970, the LS6 Chevelle had closed chamber iron heads. A production
LS6 was not available in the 1971 Chevelle, the LS5 was the top offering.

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69autoXr

Except for one car rumored to have aluminum heads fromthe factory, 1970 LS-6 Chevelles had cast iron heads, but 1971 LS-6 Corvettes had aluminum heads. I believe I had heard that LS-7's destined for Corvettes would have been equipped with aluminum heads, but the crate version came with cast iron heads. It would not surprise me if GM reserved the aluminum heads for Corvette applications only. Front end weight wouldn't have been as much concern in something like a Chevelle as it would be in a Corvette.

Don't forget the L-89 Corvettes had aluminum heads as well.

bstbrgr

Your probably right. The 1970 corvette was to get the LS-7 motor and it probably would of came with aluminum heads since the LS-6 corvette in 1971 came with aluminum heads and the LS-6 Chevelle came with iron heads.

Slalom4me

bstbrgr

Posting photos of your LS7 may draw further interest from prospective
buyers.

I note that threads for the engine have been created in other
relevant sections of CF. Has it been listed elsewhere? I wonder
whether it would appeal to people who are active in vintage racing?

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bstbrgr

Photos are not to appealing, it looks like a orange big block nothing special. No chrome or aftermarket goodies on it.
I only posted it on CF in different forums. Maybe I'll post it on different car sights or maybe even E-bay.

Slalom4me

I understand your perspective.

Still, my vote is that savvy prospective buyers will appreciate your
LS7 for what it is. The person who is put off by the absence of a
chrome timing indicator or similar eye candy probably is not part of
the target market for this classic.

Perhaps also consider posting the casting number from the block, as
well as any identification stamped on the serial number pad at the
front of the deck on the pass side.

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bstbrgr

Your right I should post all the numbers and post picts. With some history of what the LS-7 engine is.

TheSkunkWorks

FWIW (and that's not much), if I were bucks up I'd have a hard time passing it up.

bstbrgr

I know it's a great deal. but what does FWIW mean?

TheSkunkWorks

For What It's Worth

My teenage daughter has been tutoring me in "Text".

bstbrgr

I learn something new every day.

trackdayc5

Slalom4me is quite correct - the crate motor LS7 454 was 12.5 to 1 compression, square port cast iron heads, and had the .560/.600 lift ZL-1 solid lifter camshaft. I used to have one in a 1970 Chevelle that I ran in the local illegal late Saturday night activities for several years way back when. Very, very strong combination that made power everywhere on the tach, including 7000 rpm if you weren't careful.

ghoffman

I bought an LS6 crate engine around 1986, for my '74 that came with a wimpy LS1 or something. I think it was 10.5:1 compression, and was all iron except for the aluminum intake manifold and water pump. It was rated 495 HP (I think?) and boy it sure was quick. The LS7 was basically the same but was 12:1 compression.

bstbrgr

That find of the "Virginia Gentlemen" was the greatest corvette find I've had. I also bought a 1971 LS-6 Corvette with a great story also, but the 67 unfolded right here on the forum. Every day something new was discovered about this vette.

superjet701k

this may not be true my uncle up in MA just bought a 1974 brown with gold metal flake, T top 454 with 13000 miles on it and has a ls7 engine. vin and engine serial have been verified and match. im waiting to find out more info he brought it to a corvette expert on c1 an c2 cars and hes looking into it. my question i asked was are the heads aluminum im waiting for a answer. the car also a R code and has upgraded factory springs shocks and brakes i believe. the problem is im 1500 miles from the car and its his first vette and hes 60. but the 75 year old man he purchased it from told him its a ls7 engine.

parkerracing

NICE WAGON! I'm aquiring the parts to do that to mine.