I assume when you lubed the front seal, you mean just the inner lip. If you lubed the outside it may pop out. Insure the lip is over that inner crank sleeve. If not, when you install the balancer it will pinch it (how would I know?). I coated that sleeve inside surface w/ gasket sealant. Seems oil could come thru the metal-metal gap otherwise. Not knowing better, I did re-use the crank pins on my 1985 since they were stuck to the balancer. No problems after 2 years or so. Looks like you didn't change that $7 oil pump chain tensioning rail while it was easy. Many have found them cracked. In my 1984 it had broken off the pivot.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans