Okay I replaced my head with oversized valves and a 270 cam and now I can't get my timing right. What happens is when i take off it boggs then goes good after that.

 

I tried the timing from the book which is 5 dagree's and and that put it way to far retarded and where it idle's good is to far advanced and won't perform good at higher RPM's. Anybody ahve any idea's??

 

Hey jake thanks. Yeah i did that but to no evail. 850 sounds right to me also but right now i have it at about 1000 or 750 depending on what the truck feels like that day.
I have a LC Engineering adjustable cam gear and so i called them and found out that you have to match up thiers with the stock one and mark it where tdc is.