t's probably something small that I missed, but here's what I got. The car has been sitting since mid April. It has a full tank of gas and Sta-Bil in it. Over this period of time, I've put on new spark plugs and wires, new headers, removed the air pump & associated lines, removed the EGR and cleaned up some other small vacuum lines. I installed the headers and reducers and do NOT have a new 02 sensor in there yet, waiting on it to show up. I wanted to start the car, but it'll just crank and I hear it pop like it's trying to fire, but never does. I reconfirmed firing order (HEI distributor) and it looks good. Is there anything I missed or anything I removed that could be preventing it from starting? Thanks for the help everyone!