If any of you are interested I have attached a list of all GM block codes, ci, the year, bolt config and source sorted by casting number.

Included is the a list of all GM head casting codes, the year they were used, block sized used on and valve configuration all sorted by casting number.

RP.

 

is that from mortec?

 

thay Palric do you have one for Chevy Aluminum Cylinder Heads. i am looking for a set from a vett to install but i dont know what the part# is

 

I have a problem with the statement that the casting numbers will also give you valve sizes.

GM/Chevy were infamous for using the same casting on cylinder heads and using 2-3 different sized valves depending on the application.

I.e. a very common mid '70s to early '80s head, # 333882 was used in everything from soup to nuts practically- full-size passenger cars, mid-size cars, trucks, F-Bodies and on both 350 and 400 inch blocks. Known valve sizes included 2.02/1.60, 1.94/1.54 and some people have sworn they've seen them at 1.84/1.50 on some trucks. All the same casting number...

So how does this listing differentiate the heads beyond the basic casting number?

 

I think there were some aluminum heads in the list ???

 

Don't remember where I got it -- some web based source.

 

Sorry.

RP.

 

HEy Triggar! the heads you are looking for are..

10088113...88-up...350..........Aluminum, 58cc, angle plug, raised
"D" port exhaust, 1.94"/1.5" valves

How I know this is that i am looking for a set aswell...hahahaha
they are great heads..but expensive as hell