I'm not one to put modern seats in a vintage car unless I literally have nothing else to put in. That said. I'm of the school that there's zero point in building a car unless it's actually going to get driven.....as in you calculate oil changes by mileage not time. So if a later set would mean the difference between an occasional Sunday drive vs the car being a regular sight about town I say do the newer seats
A vote for high back seats. I was 78 miles from home. No whiplash. I was able to drive it home. Russ p.s. The insurance company totaled this car .