If any gasket or even the rad is leaking, sure, that smell could get into the cabin via the air ducts.. Anything happening under the hood will get sucked up into the heater vents, the intakes are right under the windshield wipers.
A little moisture on the filler cap isn't all that unusual, especially in cold weather. I've seen it on my Taurus, both '93 bonnys, my 95 eighty eight, my 99 eighty eight, and my '04 chrysler minivan.
Make darn sure you can drive it that hour long, a new engine is much more expensive than a tow..
1993 Bonneville SE, frame off resto in progress, will be stock except painted black & chrome t-stars, estimated finish date - spring 2009.
Cars in my "fleet": the bonny project, the bonny parts car, 1999 Olds eighty-eight LS anniversary, 2004 chrys T & C.
Husband, father of two daughters, deer hunter and lover of most things GM, (although I do like my Chrysler minivan) - but nothing comes before my girls..
I'd much rather go home after work and be with my family than do anything else..