Should I even consider it for a 12.00 second car or is it not really necessary? I was just thinking that since I am going to be switching over to 1 7/8" headers and they are used, I could weld any fittings, bungs, etc. onto/into them before I get them coated. Just wondering if the evac system is worth it or not on my car?

I assume that if you are using an AFR meter you would need to weld the evac connections in AFTER the O2 sensor bung...right?