I like to thank you guys for earlier input on my smallblock! I have an update for you guys on my 1.94 head dilema. I took the heads to my local machine shop to have them
dipped, magnafluxed and resurfaced. Remember
the castings were 882s which everyone told me were 1.94 76cc smog heads. Well hears the
twist, the valves measured to be 2.02 intake
& and 1.62 exhaust valves. The guys told me they were factory valves for that application
which were used on Corvettes. He nailed it on the head because the block is out of 75 vette. He also told me they were rare to have but they did make them. Also he said they would have pushrod girdles and scew in studs which it does. I was amazed at this info?? Has anyone come across this? Is there a Vette person around to confirm?
Thanx for the Help!

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Had 1977 LT 10yrs
Have 1980 Z28 2nd Yr
Red,4spd,350cid,Dynamax Duals with Heddman Headers.Rest of Car OE!

Everything I have says they weren't available in that configuration, so , someone probably added the large valves, with studs and guideplates during a rebuild.

Ok I know this sounds crazy but I talked to the guy I bought it from. Actually I work with him. He told me when he worked at GM dealership a customer bought this vette, wanted a big block. So the kind person he was
told the customer that he would change the motor for him for a price at his garage at home. He told me he changed the engine and out of good faith the customer gave the smallblock to him for his work. He put it in his 32 coupe,raced it,showed it,and used it for a daily driver off and on for 5yrs. The only thing he freshened up was a set of flatops and rings. Been setting in his Garage
ever since till present day. He even jerked a tear when he dropped it off. I don't think he lie to me but stranger things have happened. http://www.nastyz28.com/ubb/smile.gif Maybe it was something the dealer had done who knows? But I would like to investigate it further. Thanks for your input.

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Had 1977 LT 10yrs
Have 1980 Z28 2nd Yr
Red,4spd,350cid,Dynamax Duals with Heddman Headers.Rest of Car OE!

I do not know why someone would want to go to the expense and trouble to modify a pair of 1.94's to 2.02's and all the other associated stuff when it would be cheaper to purchase a set of 2.02's already set up as such.

Bob R

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1973 Z28 Original Owner
Full Restoration
Yes I am that old.
#'s match

I wonder if GM made a mistake on the casting
numbers on the heads? I have the living proof of 2.02 valves in my hand. Is there any other way to check besides the valve size?

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Had 1977 LT 10yrs
Have 1980 Z28 2nd Yr
Red,4spd,350cid,Dynamax Duals with Heddman Headers.Rest of Car OE!

OK, here is the straight scoop on your heads. Colvin in "Chevy by the Numbers, 70-75" says.

Head #333881, 1975 Corvette, 2.02/1.60 valves.
"This head is identical with #333882 except valve spring seat dimension was increased to accept 2.02/1.60 valves."
And he adds: "CASTING #333882 MAY APPEAR ON THIS PART"
So, what you have there is a factory set of 2.02 valve '75 heads. Definitely rare for that era.

Bob, the reason most heads had the big valves installed was there didn't used to be so many aftermarket companies making big valve heads available to the public like they are now. In the mid to late ' 70's the only ones you could easily get were the #292 Turbo heads from the G.M. parts counter, and most people just figured it was easier to install bigger valves. Now that the market is flooded with viable options in the head category, you are better off buying new , than throwing a wad of $$$ in a used set that won't flow like the aftermarket ones.

Thanks Gary S & Doug G for the answer to my head dilema. I thought these heads were not
modified after the factory. I'll be sure to
keep a hold of them. I currently have them dipped and cleaned, Magnafluxed for cracks (were none), and resurfaced. Right now I'm
currently debating if I should change the valve guides or use the old ones. If I do decide to change them should I do the or a Machine shop. Where do you get them?
Thanx again for you info !!

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Had 1977 LT 10yrs
Have 1980 Z28 2nd Yr
Red,4spd,350cid,Dynamax Duals with Heddman Headers.Rest of Car OE!

Looking at my resource book indicates if head is found with 2.02/1.60 valves refer to 881 heads-and the application was for corvette and Z28.The heads also have a double heat riser passage and tapered spark plug hole.

straight out of the chevy by the numbers book head is identical to 881 casting valve spring seat was increased to 0.84 to accept the 2.02/1.60 valves casting #333882 may appear on this part the cylinder head has a tapered spark plug seat and a double heat riser passage.75 vette 350 eng. 205 horsepower . remember guys these were the days of hunting horsepower with smog control.