STLCRZY

Hi.. ,
i īm in search of a pair of C heads for my 72 455 engine,and i have a few rookie questions.

Is there any differences between the C heads,what must i know.?
How much are they worth?


many thanks

droptopron

I believe there were smaller valve versions of C heads used so check the valve sizes.
I could be wrong on this.

TripDeuces

So where are you located?

joe_padavano

Correct, same basic casting could be machined for either big or small valves.

69442C

There were also differences in the heat cross over ports. I have a set of C heads with small cross over ports that are about 5/8" wide by 1 1/4" tall. This is much smaller than the heat cross over ports on another set of C heads I have. Why the difference and was it model specific?

507OLDS

If you have the 72 Ga heads from your 72 455,use those.You will not find any differences in performance between the two.

STLCRZY

My location is Germany ;-(

About the valves in the Cīs:
Intake can be 2.000, or 2.072"
Exhaust are the same 1.625" correct?

About my 72 Ga :
any way to see what valve size are installed without remove the heads and measure it?

thanks

507OLDS

You need the head off to measure the valve.

STLCRZY

Brian,correct me if i am wrong...my English is not the best.

You say,i donīt feel any significant difference in Performance between the big valves Cīs and the big valves Gaīs (the Cīs not worth the extra money)?

thanks

cutlassefi

Correct. Virtually all of the big valve heads will give similar performance.

STLCRZY

Okay...

Thanks
Mark.