When I was in the 300s and old ChroMo FUJI saved me. So I am thinking ChroMo UNIVEGA or FUJI should do the trick with 27 1-1/4 rims and 36 14ga spokes. Be sure to have a long cage derailleur and a 34T cog on that freewheel. Having two wheel sets for an old ChroMo is not that expensive. So one wheel set with tires for the road and another one for Ravel is great.
I normally ride by myself but a few times some light weight young-uns would pick up my bike and make faces at the weight. My comment was I could knock a few pounds off the bike by just taking a good **** before my ride. At that they usually just put my bike down not wanting to engage.