its more in the 40-50lb range ill be saving

I doubt that very much.

And even if it was that much that's insignificant given the weight of a Corvette. I'll take the durability every time but of course its up to you.

Ill weigh them and let yall know, if they look good ill be getting them tomorrow

stuff like stripped spark plug threads is because people don't use anti seize or overtighten or both. aluminum will move around so the proper gasket is important. and some may disagree,but i won't install aluminum heads without studs. they have been used in oem applications for years with few issues. i also check the block deck for flatness. its like everything else you can't really bolt them on without checking.

Roger that! Have only used them on 2 builds (last 2), and have not been disappointed. I'm sold on these heads.

Cranking down on a spark plug when the head is hot is a good way to strip the threads also.

I'm putting Vortecs on my 350. If there's an aluminum version I don't want them - nothing to be gained and plenty to lose.

Either one work fine but aluminum is easy to repair should you toss a valve put a hole in the chamber or a simple crack.

And you can run more compression on pump gas with them

I heard both sides of the argument the first time i bought aluminum, liked so much used aluminum on the second engine. The heat disipation alone is a gain well worth it. My friends who saw things the way you do all had an engine of some type in the day that overheated and warped the head. Usually porting cast iron heads cost more because the labor goes up. I might get corrected hear but most modern engines use aluminum. Now i no you minds made up and i respect that, but 10,000,000 gear heads cant all be wrong.

Corvettes have had aluminum heads since the middle of the 1986 model year with no widespread problems. There are many good reasons for going aluminum, already mentioned. They work well.
Aluminum casting techniques are now perfected to having engine blocks of aluminum - since the 1997 model year for Corvettes.
Reducing engine weight in a Corvette is always a good thing.
Old school is old school. If that's your preference, go for cast iron, but there is no advantage other than (maybe) cost.

Pete

If you do pick them up , spend a few dollars putting in exhaust phosphorus bronze guides. Mine bagged on me and a buddies bagged on him. I think I had them installed for $80 ?

Wrong.

Iron is more durable, my husband tells me all the time about aluminum heads at his shop with stripped spark plug threads and failed gaskets due to the different expansion rates of iron blocks and aluminum heads. If you've got an all aluminum engine that eliminates one problem but you'll never measure the difference in performance from saving 40lbs on your car. There's just no good reason to put aluminum heads on an iron block and plenty of reason not to. People like to do it primarily because of the fad mentality despite the drawbacks.

Ive had alu heads on my big block for 5 years now, no problems, and if its so bad why would chevrolet still do it in the trucks? Like one poster said they came on every corvette after 86. If there was a problem people wouldent run them and companies wouldent make them.

Once again, as is the case with the weight "savings" you'd wouldn't even be able to measure the difference at the race track. The advantages to aluminum are insignificant and the drawbacks significant.

Iron heads are no more likely to warp than aluminum That your friend warped his heads and you didn't had nothing to do with the material they're made of, it was due to a wide variety of other factors.

And yes, 10,000,000 gear heads can certainly be wrong. Its a logical fallacy that more people believing something means its correct.

Piyra, I'm sorry but you don't know what you talking about. I'm not wrong, you are. I don't want to get into a pi$$ing contest with you. You seem to be parroting your husband's opinions. Maybe up in the frozen north where you are there are problems with aluminum heads on iron blocks, but elsewhere that just isn't the case.
Stick with what you want and enjoy it, but don't tell us with real world experience that we are wrong. We're not!
Pete

My friends warped heads were aluminum heads usually on 4 bangers. Look you don't want to run them, we get that.

I live in the frozen north havnt had an issue.

Pete, most people aren't going to have a problem with them but my husband has dealt with thousands of cars and he's seen first hand aluminum heads have problems with stripped spark plug threads and blown head gaskets much more often than iron heads. Your one anecdotal experience doesn't even begin to make you an authority on this. Your "real world experience" is virtually nonexistent compared to his.

I've had enough of this "I haven't had a problem and that makes me an expert and I say there are no problems with aluminum heads". Go ahead and buy something that's fragile for performance gains that are mostly imaginary

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