Just a quick update. I ordered a set of advance bushings for my MSD pro billet so I could run 20* initial and 34 total. The biggest bushing in the kit that comes w the dist is 18* and only allows for 16 initial, if u need 34 total. Anyhow, board member crackedback makes a 10* and 14* advance bushing, and I can confirm that his 14 is dead on. 22 bucks for both and very quick shipping. Another Moparts member coming through with a nice product