I can't seem to find info on small block chevy head #336882.
Does anyone know what the spec's are on this cylinder head??
I have engine block # K12 09 CNV with the #336882 heads, I'm try to find out what the compression ratio would be with this type of set up.
All parts are stock.

Keeping vintage Chevy alive.

Are you sure that you have not missed a digit? Casting numbers for the V-8 era I have have 7 or more digits.

could the head number be 333882 ? If so its usage is listed as 74-80...350/400....76cc chambers

DD

Hi: Chipper
The engine code for the block is as follow's, # 101140287 K12 09 CNV on the pad in front of passenger head.
The Cylinder head number is as follow,s # 336882 M14T E28-74.
My guess is the block is a 1970 with 1974 heads, but what would this combo make for compression??
I am doing a engine build up and need to have at least 9.5.1 compression if not more.
Hope this helps.

Keeping vintage Chevy alive.

This is not positive information - but- I believe the 1971 and up engines had the dished top pistons to lower the compression ratio so using the heads with flat top pistons would give a fairly high C.R.

Hi :dandyd
I did a double check on the #'s and is #336882, I have found the #333882 heads on line, but can't find any info on the #336882 heads.
It has me stumped.


Keeping vintage Chevy alive.

Jay,
The 336 series head casting numbers are for big blocks.The number you have must be a mis cast 333882 head.Assuming this and if your 70 350 cnv motor still has the stock rotating assembly it will have 9:1 compression ratio.The 333882 head has a 76cc as does a stock 70 head.So your comp ratio using info here will still be 9:1,which is lower than you want. Jim

Thank's jimpala70
This is great, I was kinda thinking that the head was a one off, haveing the 336882 numbers, being a small block.
I'll check out some new pistons, mabey I could raise the compression this way, any ideas which may help bring this compression up without a major rebuild?
The rotating assembly is original and in great shape for the year.

Keeping vintage Chevy alive.

Hey,most of us in the VCCA like our vehicles stock,Jay<vbg>.Just kidding.Without knowing what you are trying to accomplish I do not understand why you wish to raise compression.Other more efficient ways of increasing performance while burning today's fuel would be through cam/valve train, ignition upgrades and fuel system/carb.Just my thoughts.Jim

Hi:Jim
I pulled this motor out of an old Caprice that was going to the scap yard, Car was beyond resto (rust bucket/swiss cheese)., but had low miles on the motor, and still running.
I have a 1967 Chevrolet CST short box truck with a dead 283 in it,and want to put the 350 in it's place.
I would like to refresh this motor to get a little more bang for the buck, but still keep it as close to stock.


Keeping vintage Chevy alive.