But it won't run. I can get it started once and awhile if I turn the dist to about 30 degrees advanced, but if I return it back towards 10 degrees it dies, and becomes harder to start. It also appears to be harder to start when warm.
This engine ran really nice up to about two weeks ago when I noticed a slight miss or something when driving it at 60 mph, just barely noticeable. Mechanic who was checking my drive shaft balance didn't notice any problems. Over the next week it progressively got worse... until it wouldn't start unless I started advancing the distributor as noted above.
Originally I thought I had a broken coil wire to the horseshoe connector, so I replaced it with a new one. Didn't solve the problem.
Replaced the plugs, cap and rotor, just in case something was amiss there but again no difference.
Any suggestions......one thought I had was whether the carb is passing too much fuel, maybe a cracked carb body? Crack worsend over couple weeks? Would that explain why it might run 30 degrees advanced? (advance gives the engine time to burn the fuel but at 10 degrees floods out?)
Other particulars:
9.0 compression
351W heads
Blueprinted Duraspark by Accel
MSD 6AL box
Mild cam
about 8,000 miles on engine
does not burn oil or consume fluids
17 inches vaccum
Edelbrock Performer manifold
Holley 600 4150
Holley mechanical fuel pump