Hello new person on this site . Have a head scratcher sbc 355 race motor I built about 3 years ago for a asphalt modified 13-1 compression world product heads . Never raced this car and finAlly have it ready to get on the track and we can’t get it to fire . This thing ran 4 months ago and now we can’t even get it to bump or back fire .
Checked timing and confirmed the #1 valves were closed on compression with the balancer marks .
also swapped out the dist with a different hei - no difference.
we are getting fuel, spark and compression and timing is on and it will not fire .
Been doing sbc motors for years and this has me baffled, any ideas would be appreciated

thanks

 

You went from a distributor to hei? Reason I am asking is I've seen this issue with a cracked distributor cap. was the hei used, and running on an engine?

 

Yes this hei was on the motor when it was running 4 months ago

 

Hot wire the ignition, could be the ignition switch. Jumper battery to the coil, then try to start it.