440 source stealth head CC

Trying to check out some things today. I loaned and lost my good cc burette and I only have my backup syringe. The 440 stealth heads advertise an 80cc chamber. What are you guys getting on your stealth heads? I got 85 on my first cly.

Ok, I’ve got 85,83,83,84 on one head. I guess if I’m wrong, at least I’m consistent!

Mine were 85 ish to 84 ish, after some work they were very close to 86

I just checked a set of old 516. Cleaned up with what appears to be the factory surface on the head and one valve job they are a very carefully measured 79cc so I think I’m close.

The early casting where bigger (85+) than the current 80.0CC ones they now sell

My stealth started at 80cc, then after unshrouding they were about 84-85. milled them .020 to get back to 80cc. By the way 516 heads stock are 84cc and 915s about 80cc

My 516's were either 78.5 or 79.5, can't remember that far back.
The old Direct Connection "bible" says the NHRA Blueprint spec was 73.5 but of course that's not an as-produced number

These are advertised as 80 but a with disclaimer of variances. I just received these last week. Old or new, idk?