Misc.Parts I am Looking for!
Did you GAP the plugs properly? I'm just asking,no offense :)
No thoughts on J 20 scavenging?
Check your batteries....Sounds like to me that they have enough to crank, but not enough for good spark...but when you roll it your not cranking the engine by starter so you have good spark to the plugs...Also check your ground...make sure you have a good ground as that will play hell with your system if you don't. Put a battery tester on each battery by them selvs and check them (disconnect them from each other and the system.) Also check your terminals....Lastly how does the volt gage look? Is it in the green? You may be wearing down the batteries and not charging them back up....When trouble shooting alsways start at the simplest and work your way to the hardest.