Can anyone tell me the combustion chamber cc's of a small block #813 head? Used in 69-79 truck 350's.

Without going to Mortec, I would say 72-76 cc. If you get the
chance, type in Mortec on Google and you'll find a wealth of info
on their site.

I'm hoping it's the same as #185 heads, 69 cc. I tried Mortec, cc's aren't listed for the #813. Need someone with a '70 and up "Chevy By The Numbers".

They should be 76 CC heads.... because they are legal heads in my circle track class which is supposed to be 76 oir larger....port volumes are.. I 138.0 Exhaust 72.0 which are pretty small on the intake side anyway..

Looks like 74 cc. I found a '69 head in my 65-69 CBTN with 74 cc that says the same head also was used in '70 with the #813 number.

I'm hoping it's the same as #185 heads, 69 cc. I tried Mortec, cc's aren't listed for the #813. Need someone with a '70 and up "Chevy By The Numbers".

I have those books, no 813 shown. They only have passenger car info in those books. Sorry.