ok, I replaced the heads, lifters, cam, and intake. It'll crank, but it won't even fire. Everyonce inawhile I get one good backfire but that's about it. It bare cranks now cause the battery is about dead. I've retarded the timing and advanced the timing and nothing seems to help. I double checked all the wires and I'm definitely getting spark. I think I'm getting fuel. when I open the throttle all the way I see the jets squirting. I figure it's something to do with the timing. I put my finger over the #1 spark plug and cranked it until I felt it push it out. I brought the mark up to 0 degrees and then I set the distributor to #1 and dropped it in. Any ideas?