Factory 289 head/cam specs

[streetstang67]

I thought my 289 had 58cc heads, but when I plug that into desktop dyno, it gives me a compression of around 11. I thought I had compression of 9.3 but when thats plugged into desktop dyno, it gives me combustion chambers of over 70cc's. What exactly are the stock specs for '67, c-code (2 barrel) 289?

 

[84convertablegt]

heads are 58 cc. cam specs are .368 intake .381 exhaust..dont know duration. stock compression for a 67 c code is 9.3:1