[acindrich]

The billet 427 or 351 would be a nice trickle down item. A stressed tunnel and structural footboxes would also seem nice for stiffening the ride. Those might not be as effective though as they were on the billet car if they can't be integrated into an original seemlessly. I will say, as the designer of the Billet car, that anything is possible with some creative thought a little time and someone paying to keep the computers and the mills running.