1) Not sure on the age of the carb. I know they don't sell this model anymore so its at least several years old. I didn't give it much attention in the past but it would probably be good to rebuild it anyway

2) Banshee, I guess I was thinking 8-9 C/R was OK for a pump gas street driver..? I usually run mid-high octane pump gas. The 8.6 number is an estimate. I didn't take volume measurements when I had the heads off because I thought I was in the ballpark. 670 heads but the block was bored .030 over and it had the 4 scallop top pistons. The cam I took out was a 216/228 lift that ran fine so I thought the new one wouldn't have much change. I didn't know any of this before I bought the hardware and opened up the engine.
The carb is a 850 cfm designed for the performer RPM intake which I don't have. Sounds like its too much carb anyway.