Something made me scratch my head

67Dart273 said
You'd never feel ONLY the difference in compression the plugs could have cause "by the seat of your pants.

Here's one possibility:

Do I understand --that you changed the plugs, the coil, and the box?

Here's one possibility---the "insides" of a Mopar box work JUST like points, that is--

the box switches the coil on/ off AND IT HAS a "condenser" (capacitor) inside the box JUST like your old points distributor did.

'S also possible - assuming you changed the coil - that it was a little on the lame side, too.

So what else did you change? Plug wires?

It's very possible that the old box, overheating and puking guts--also deteriorated the capacitor, causing reduced spark

I changed to a new coil made for electronic system ramoved the original old coil that was put there from the factory for points.
I took the blue box off and got an ECU for a 225 electronic 4 pin truck "NAPA"
Installed NGK plugs.

I am still running the new wires I put on when I changed to electronic 2 years ago .
I bet you are right, I was just thinking if the the plugs "and they was" shorter and had the washer it might have had something to do with my happy results :iconbigg: so if anything, I had a little bit low compression all the time becouse the plugs was not all the way in. I am sure you are correct, Thank you.