classic hot rod stance, big rears, smaller fronts.
wonder how plush the ride is in the Thrush SST (steel railroad wheels)
with a smaller front i could see handling issues in a road racing car because you would generally have the back higher than the front, unless you designed that in to your suspension. most of the G machines have all the same diameter wheels which would keep them level. but the best looking cars i've seen and winners of best h.r. of the year all seemed to have 20 inch rears and 18" front lately. that silver 57 T-bird is so rad. i got 17s all around my tempest for tire rotation only, which is why i got the same size tire all around. then i wished i would have gotten at the very least, a thinner tire for the front because i thought wide width was what was making my car get tossed around like a rag doll by the ruts in the highway. now i come to find out from a friend that it's not my width, but the small sidewall from the Z rated tires that is what's letting the ruts toss me around, so it wouldn't really matter as all your bigger diameter tires have thin sidewalls. the only solution i see is a front tire with a good size sidewall. weather it will take going back to a 15 inch wheel or if a 16 would be enough i couldnt say. might make a good thread