I called comp cams and their reccomendation was 12-239-3, but I filled out the form on their website and they said 12-235-2. I just wanted to get your opinions to see which one I should get. I have a 350, 4.56 gears stock heads, edlebrock performer intake, headers, 700r4. I dont do much crawling, maby 3-4 times a year. down here we mostly have mud, and I go to the sand dunes once a month.