Just picked up what is said to be a 383 motor and it has TBI. Seems to be, it looks like an older block with new style heads. Also has the external balanced crank so this much I believe to be true. What are my cam options to run with my current set up? (thinking ahead just in case ) It's in my 71 K5 that is built and used for 99% wheeling and 1% surface street runs. Basic drive train specs: 383/th-400/203/205 w/5:13's and 40's. The motor hates to be @ zero and if much more timing is put in manually, it will start spark knocking. My current plug wires are junk, installed em only to get it running. Waiting for the ones I ordered to show up. (armored for heat) So I'm hoping the the crappy plug wires are causing some issue's here. I'm willing to swap out the cam to make the computer happy, so give me some input PLEASE.