ok, my bad.....feeling sick today so my humor level is low. I just honestly didn't understand your reply.....came across to me like you were being an a-hole. BUt i do appericate all the tech and humor. As you can tell by my post numbers i'm still pretty fresh here.....just learning the way and feeling people out. Sorry for my rude post back. Now then....it's a new carb, no back fire, adjusted the idle so that it idles good, but once it's in gear the motor sounds like it's gonna die. Put it in park and it's good again. By going to a 750 cfm carb from a 600 cfm, would i need to adjust my timing some?? If so which way and way?