I have the opportunity to buy a 65 impala station wagon

Sounds like a cool wagon Greymouser! I don't follow them so can't offer much in way of pricing. But other than a sweet 55 Belaire w 283 and dual quads, my Dad drove nothing but Big Block Chevy wagons about 1960 until the 80's, when he moved into BB Suburbans. I remember him surprising more thank a few "youngins" in their hot rods at stop lights when I was a kid. Those old wagons would hook! I often think of building one some day, but think the Boss would kill me if I drag one home before we get the kids through school! Good luck with the purchase!

Pat