No first hand experience here....but did speak to a guy at a car show recently who slid a Lincoln chassis under a 60 Galaxie. Two things I remember from that conversation. He indicated the firewall had to be relocated and secondly, I could see some of the Lincoln frame poking out of the Galaxies front inner fenders. It looked unslightly in my opinion.

Thanks for the responses. I found a guy in FL that makes a narrowed kit that seems like it would work on the older chassis but I would like to talk to someone who has done it first. Thanks, Rick