Lou,
I have no information on what you are asking, but I am wondering why it's important to you. Is it running bad or having problems?
There are two internal items that are the most critical in my opinion. First is cam selection and the second is pistons for the compression ratio, in that order. The cam selection will set the personality of your engine. Most guys will over-cam the engine. Meaning to much duration for the majority of the use of the vehicle. After all the calculations with rear axle ratios and trans gears, it comes down to what RPM range are you running in. A bad cam selection will make your engine run like a dog at lower RPMs and run great at higher RPMs and visa versa. There is tons of literature on the subject. Comp cams has a free computer program that you can download that can help with cam selection. You can check what cam you have with a degree wheel, piston stop and a dial indicator. There are good articles out there on the subject.
Piston selection with your head chamber CC sets your compression ratio. To high a compression ratio for the street car can cause detonation problems with limited gas octane availability and make AF ratio and timing more critical. To low of compression and you are really giving up power potential. For street cars with a carb I like staying in the 9-10s. Higher compression ratios also cut down on the life of the engine. You can pull a plug and look in the hole to try and see if you have a dished, flat top, or domed piston. That can give you some idea. Good luck.
Wayne