Have a set of 3904390 heads and was wondering if these are good performance heads?

Click up on the search and type in 390 heads. I'm not trying to be a smart ass, it's quicker than waiting on a reply a lot of times. Lots of good reading. From what I just read in a quick minute they are the small chamber big ovals. Good heads to bring up your compression up with flat top piston.
I have 702s (closed chamber), on my 454 with flattops. I did all the calculations and came up with 9.3 to one. Well, I had help from others on this site on the math. :) Pretty good comp for a street motor. I haven't got to drive it yet but it sounds real tough idling in my driveway. :D
Later Josh.