Originally posted by maddmitch
Hey Guys,

Any know how far advanced my timing should be in Colorado? I brought my truck out from Michigan and have been having lots of trouble getting it to run right. I think I'm at 6-7 degrees advanced right now and I still keep getting backfires here and there..no alot..but just enough...and my gas milage is aweful. My set up is a 350 SBC bored 30 over with a 600 Edelbrock Preformer carb, 1/2 spacer. Other than that rest is stock. If anyone could shed some light would be greatly apperciated. Altitude where I live is about 5800 i think.

Thanks, Mitch J
looks like no body else is gonna awswer this mitch so ill start so somebody will come out and tell me im crazy as hell, but far as i know the Altitude wouldnt have anything to do with the timing. it will lean out or richen the carb. you say the timing is at 6-7 degrees advanced now , is that your base timing or you total adv. timing. sounds like if every thing is the same like you fuel have leaned out, might need to rejet the carb. JMO