The F&C and WrightTrak models are different reflecting the early (25501-26500) and late 22301-25500 // 23601-25500) production X29D cars, respectively. The difference is in the "short" and "long" taper of their improved Dreadnaught ends. "Short" is the older style found on the 9-52 to 4-53 production (1000 cars)---F&C. "Long" is the 6-55 through 7-56 (3100 cars)---WrightTrak. It seems unlikely that any of the newer cars would have been painted with other than shadow-keystone stencils.
I hope this helps in understanding the models. I am not sure just what is really desired here if accurately lettered models are the target. I am also not aware of the lettering style of the Mount Vernon product, that is 'circle' or 'shadow' keystone. But, I am sure that shadow applies to the newer cars.
Regards from Pennsy country, Grove City, Penna.
From: "jdcellarmod@... [STMFC]" To: STMFC@...
Sent: Friday, November 4, 2016 9:17 AM
Subject: [STMFC] RE: PRR X29D
Looking at the F&C and WrightTrak models. Can the WrightTrak model be back dated by simply changing the lettering using the Mount Vernon Shops decals? Any thoughts on either model would be appreciated. Thanks