Do you guys let your engines breakin or do you BOMB them right away? I got about 10k on mine, (see sig) and I am getting ready to loose the muffler. I figure I'll wait till 25-30k until I get my EZ and injectors (DD1's?). By then I'll have a full set of gauges and I'll be ready for 4" exhaust, an AFE megacannon, and synthetic oil(amsoil?) Any opinions?