The Chevy heads with casting number 397291 typically use 3/8-inch diameter rocker arm studs. These heads are commonly associated with small-block Chevrolet engines, particularly those produced in the late 1960s and early 1970s. Always confirm with specific engine specifications, as variations may exist based on production year and modifications.
they came with "186" casting number heads.........
The Chevy casting number 460777 corresponds to a cylinder head that was produced in 1972. These heads were typically used on various Chevy small block engines during that time. To confirm specifics about the application, it's recommended to check additional identifying marks or numbers on the head.
1970-71 Chevrolet Small Block 400cid heads.
The combustion chamber size of the heads with the casting number 376450 is 60cc. It is possible to install larger valves.
1979 267 / 350 engine ! Danny Coleman
You need to get a Casting # book and look up which heads you have.
The chambers are 60cc. The heads are from 77-78 307 engine.
Find the casting number on them... type "GM (insert casting number)" into a search engine and you should find what you're looking for.
If it has a 5.3 engine, first have the cylinder heads pressure tested. Heads with a casting # of 706 like to crack in the number 1 head bolt hole. If this happens, replace head.
There 194 heads 1970 to 1980 heavy cast iron heads
Find a book on casting numbers for chevys it will give you the year of the block the heads & the manifolds.
read casting numbers and research on the web. Just Google small block Chevy heads castine numbers. These numbers are under the valve covers so you will have to take one off.