Alright guys, As some of you know I have been putting a TPI engine into my '73 Blazer. I have a thread going about the progess, but I need help.The engine is in and the harness hooked up. I turn the key to the "On" position and sure enough the fuel pump primes and the light on the harness comes on. I turn the key and the engine cranks over, with fuel going to the rail, but no spark. We pulled a plug to test and sure enough no spark. There is only 4 wires (In a connector) going to the distributor and then a connector fromt eh distributor to the coil...so would that be the place to check? Anything else obvious to look for? The oil pressure sensor is hooked up just above the oil filter and has three wires coming from it, two go to the harness and one is extra according to the painless wiring instructions...Interstingly enough and completely unrelated, the oil pressure guage which I have plugged into the rear of the block via some brass NPT fittings isn't getting oil... Ok guys, impress me with your in depth knowledge and help me figure out how to get my junk running.