Jon,
I'd like to restore them to as close to original as possible. I put KDs on the Pullman, other than that I want to use only parts that were available when the kit was offered.
On at least one of the Yard Hogs I plan to use all MDC original parts , including the lift type knuckle couplers like the ones on the Globe box car.
I'd like to find some of the Kemtron upgrade parts for the other one.