Well I lost the information that was up before because I did not print it. The question is what is a good cam for a 99 5.3L ext cab truck? I need it to be emission friendly so if Atlanta grows so they can pass the fed's testing I will have to comply at sometime. I am planning on . Will be order next week. So I can be a sheep in wolf clothing. Yank 3600 stall converter order and ASM headers. Well thanks for the help? I had some good info. but I don't remember it. Also were can I find the cam you are talking about? I have been looking at Thunderracing.com at them. I don't know how to read spec. printed.