The closer the grip & elbows to the side, the more influence on the triceps. If 8" is not to your liking than try a little wider, no one is built the same. There are no golden rules in BB'ing that any grip is right for everyone. That 6-8" is a general gage. Might also try 4" to 6" top position bench lockouts (prefered on a power rack), where a 6" grip/hand spacing will feel much better on you. Your elbows will flair out some at this top position , mostly all triceps at this point. These lockout can be a massive triceps builder for a lot of guy's. Or if you have an Olympic style tricep bar than try BP's with that. Do DB hammer grip BP's, again keeping the elbows somewhat close to the body. Good Luck