I just finished breaking in my new motor in my 71 and am ready to dive into injection. I would like to do it as cheap as possible and not with an off the shelf setup, but have a few questions about what to run with my setup. My motor is a 91 350 with the zz4 roller cam, sportsman II 185 heads, performer rpm intake, avenger 670 carb, billit mallory HEI, serp setup, rams horns, and 2.5 dual exhaust. The heads are the 87+ style intake pattern. I like the looks of tpi but heard it would be expensive to setup to feed this motor, and kindof like the idea of the simplicity of a TBI setup. Plus I already have a decent intake for it. What would you guys recommend I look for? Also, I am running a holley blue electric fuel pump that flow at 14psi, can I use this pump with a TBI or do I need a new one? As for the ECM, I do have a laptop to use for tuning, and would like to use some type of data logging and an oxygen sensor. I have been over to thirdgen but got a hail of funk thrown my way the second I mentioned truck, even though my motor is built very similar to many of theirs.