Advice Needed - Can't Start Rebuilt 273

tyler_s18 said
so you have visualy seen spark at the end of the wire? if so it is probably not spark. could the timing chain of jumped or broke? you gotta have spark, compression and fule. it sounds like there is plenty of fuel and if there is spark at the plug then that would mean its compression. could the valves be to tight and not closing all the way? i am kinda just thinking out loud. when there is a gremlin like this i think that kinda helps. you sound pretty smart with all this which i think makes it all more frustrating when you cant figure it out lol

LOL, no doubt it's frustrating! I'm with you, thinking out loud helps. I thought I'd post the problem here so maybe that one idea from someone will spark something - uh, no pun intended.

Yeah, there is lots of fuel. Definitely has spark because it tried to run, and does kick over a lot. I checked the compression and I get 70 to 90 psi in all cylinders. Is that too low? Really seems like some timing issue with fuel spitting out the carb and a backfire through the carb...