im running a 441" ls7 13/1 compression, runs on c12 and using c16 in dedicated. gonna spray 100 and eventually 200 through no2 outlet wet plate. which plugs would be good to start with? ive searched and havent found much on high comp. engines. im assuming non proj tip 8s or 9s maybe?

 

What heads? I would start at a 9 with that much compression and since you will be spraying it. It probably needs a 6 or 7 on motor with that much compression.