Early factory G.M. Aluminum small block heads

[Don Jacks]

The first factory aluminum heads for the Chev.small block appeared in the 1961 315 hp 283 Corvette. Porisity problems caused most of them t o be recalled.Very few survived making them "rare as unto hens teeth".The authors that you're referring to don't know their butts from a hole in the ground wristpin.

 

[1958 delivery]

The first factory aluminum heads for the Chev.small block appeared in the 1961 315 hp 283 Corvette. Porisity problems caused most of them t o be recalled.Very few survived making them "rare as unto hens teeth".The authors that you're referring to don't know their butts from a hole in the ground wristpin.

They also write for CNN

 

[wristpin]

.....or are these aluminum 461x heads a Unicorn? Someone thinks they saw one who told some one who told someone else.
Im NOT SAYING they dont exist. What i have found in a few books and online is the 461x heads were produced 1960-1964. But every picture of the 461x heads is cast iron. I hope some are still around and I for one would like seeing a set with my own eyes.
Anyone have pics of an aluminum 461x head?

 

[Don Jacks]

The 61 315 horse was rated 25 hp higher than eariler engines of the same displacements.I think that they all[solid lifter,high compression,fuel injection Corvette]were the same except for the heads.The addition of the 461x's would make sense as to why the improvement.I've never seen the 61 alloy head nor do I know about the specs.,but if these heads are what Brian thinks they are we'll all see pictures soon enough.Patience Grasshopper.

 

[oldskydog]

3772895 cast 6-24-59

 

[Blk61409]

They were wrong.

 

[Blk61409]

Originally the aluminum small block was cast for the CERV 1. The experimental research vehicle Zora had developed. Mine is one of the spare block and heads cast for it.

I’ve posted before I knew a guy that worked for Jim Hall, he had an aluminum 265 in his 56, GM sent to Hall.

 

[Blk61409]

They were wrong.

 

[wristpin]

They were wrong.
View attachment 75185View attachment 75186View attachment 75187

I see 2 aluminum blocks. Whats that second Unicorn?

 

[IMBVSUR?]

And I thought because it was on the internet is was factual

 

[Blk61409]

The other block is not mine.
A YENKO 427 al blk.

 

[wristpin]

And I thought because it was on the internet is was factual

Theres the difference between Production, Factory experimental and Race team supplied. I wanted to have facts so i wasnt passing on Net BS at a later date.

 

[La Hot Rods]

Brad, I,m sure that at any given later date, you spread some BS.

 

[wristpin]

I hope so or I'd Explode

 

[Phil Reed]

Theres the difference between Production, Factory experimental and Race team supplied. I wanted to have facts so i wasnt passing on Net BS at a later date.

Pat showed us his set and I've seen a separate pair of heads about 5 years ago and they were 1960 dated. They were in Texas also.

 

[wristpin]

I believed Pat from the beginning. What was stated on a Z28 site, Corvette site and quoted from a book is what i found suspect. Seeing Pat's heads and block was a bonus. Pat I appreciate you showing us your collection as well as heads and block.

 

[IMBVSUR?]

Theres the difference between Production, Factory experimental and Race team supplied. I wanted to have facts so i wasnt passing on Net BS at a later date.

That was in no way directed at you sweetheart. That was general BS about all the BS on internet. Now go make yourself useful for some Harley parts

 

[wristpin]

That was in no way directed at you sweetheart. That was general BS about all the BS on internet. Now go make yourself useful for some Harley parts

I just bought a tank i dont need in case i have another project. Jeezus

 

[Don Jacks]

Brian and I spoke the other day.It turns out that the heads he mentioned weren't the "unicorn' 61 heads but that they were the 86 Corvette heads that had been modified to accept the early valve covers.He wisely passed on that deal.

 

[MRHP]

Yes, quite disappointing.