B.Dodge........what does my item (4) say??? 1-hr run time. BAD squarecan ignition coil???
Once the internal insulative tar melts, it will ALWAYS melt and cause weak sparkies, just as you are complaining. Unfortunately, the squarecan ignition is NOT very robust.
Remember, ittza 2-bolt, 15-min job to replace/adjust the points (0.015") on the kitchen table. Just un-snapple yer capple and letter dangle and walk. Installation is a reversal of the removal ...except... finger start the 2-bolts. Install the rotor and rotate until the OFFSET tang drive fits the OFFSET camshaft slot. Now tighten the 2-bolts and re-snapple yer capple. Simple, eh?
Remember to "polish" the INVISIBLE corrosion from between the points (0.015") after installation. Me? I clamp a clean $1-bill between the points and pull. Iff'n yer really cheap, tear a strip from HEAVY brown paper grocery sack and use that. ........HTH, Dell, yer self-appointed sparkie-meister