I'm trying to get a 1980 Chevy Silverado that has been parked for two years running again. (305 or 350) V8 2WD. It showed up in running condition but not good running condition. It would not pass inspection. I filled the dual 20 galon tanks and immediately found a leak. I dropped the tanks and replaced one. I was encouraged when the engine started up again after I installed two new sending units, new fill and vent hoses and new fuel lines. I got some lights to start working again and then my uncle the "Mechanic" told me I needed new spark plug wires. They were charred from having been left up against the manifold but the truck was still starting and running. He's advanced in years and no longer works on cars himself but I took his sagely advice anyway. He swears I have a 350 engine in this thing but the VIN says I have a 305. I can't tell the difference. I can't find the engine casting number but I'm still looking. I bought a set of bosch precut spark plug wires based on his 350 assumption and began to switch out cables. I followed instructions and did only one at a time. The very first wire had a matching length cable I could use. The very second cable I pulled was two inches shorter than the longest and two inches longer than the next shortest. I thought my uncle got the engine wrong. So I called the parts store and they said that was the right box for either engine. I packed it back up and returned it and instead got a set of universal spark plug wires that could be cut to length. That was an adventure in and of itself. After I managed to find the right kind of crimp-er for ignition wires and a you tube video teaching me how to use it I capped and booted all my wires. Next I located the firing order for a v8 chevy engine. 1-8-4-3-6-5-7-2 turns out it's the same for either 305 or 350. The starting position is the 6:30 position in a dist with points and 5:30 in an HEI dist. Doesn't matter though, I've checked and rechecked my cables and I've plugged them in using both starting positions. It started one time and ran rough. It would only stay on if I kept the gas floored. If I tried to let it idle it died. Never started again. It turns over but won't start. The one time it did start the order of my caps was wrong. Being new to do-it-yourself repairs I misunderstood the schematic. I put plug 1 in the starting position and then going in a clockwise direction plugged in the remaining cables in their cylinder numerical order. When you stop laughing realize that that's the only time it started. Someone explained the diagram to me and the firing order and now the cables are correctly aligned according to the firing order. Now, it will not start at all. Turns over and whines like the Millennium Falcon trying to escape Hoth but it simply will not start again. I ran out of daylight and didn't feel like breaking out the floods. I will locate the engine casting number and confirm my engine type when I have daylight again. Then update this post. I haven't removed the distributor. I haven't messed with the timing. I just changed the wires, capping and booting a universal set myself. It started and ran with the original burnt wires. Wish I'd left them alone now. Any help you can give me will be greatly appreciated.