Ok so im pretty close to pulling the engine out of the blazer to freshen it up and need to choose a cam. Im sticking with hydraulic flat tappet for cost. The engine will have vortec heads(got em for free), GMPP vortec to TBI intake, headers, big TBI unit and yada yada yada. Im looking for all around power improvement, but mainly mid-top end power since I have 4.88's and 36's, and this is my pre-runner project. So I called Comp Cams tonight and the tech guy told me to use a 12-249-4, it has .434 Intake, and .444 Exhaust, with 112 LS. Cam Card It seems a little small to me, but then again I dont know crap about it. I was also looking at this one and this one But I dont know if either of these would work since im running TBI, but I do know that I will most likely get a PROM burned so that everything works right.