That would be two boxcars... if I remember the folios I've seen for D&RGW passenger cars correctly, they have to be 1.5-2x as heavy, with no passengers aboard... but I agree; though 498 is in poor visual condition, I don't believe that it is probably much worse than any locomotive that has sat outside for the better half of 50 years... a tender would also have to be sourced because we have one less tender than k-37's in existence, or a new one would need to be fabricated. Though, that is if 493 operates as well as expected and the D&S is still in need of larger power...