Hi John
The colors that Weaver is doing the Bradleys are prototypical for the car while it was on the LIRR. They received the Worlds fair Orange and Grey scheme in 1963-64 . When the MTA took over, they went to work to eliminate all colors that were LIRR and repaint equipment in what were called MTA colors, Passenger cars that were retained from the fleet including the Bradleys were repainted into the MTA Light Gray and Blue probably about 1970 or so.
Yanks Pride is planning to use these with the Railking RS-1 which is in the Worlds fair Orange and Gray sweep scheme. These colors were first used on the RS-1 and RS-3 locos about 1963-64. The LIRR at this time also received fleet of 22 Alco Century C-420s which were delivered in the sweep scheme as well. These were 2000 hp ratings as opposed to the RS-1's 1000 HP rating. So most passenger trains were generally handled by the C-420s and the 10 RS-3s on the system. In the 1960's, RS-1's may have handled some passenger assignments on the Oyster Bay Branch. The Rail Road used them more for Freight assignments at that time .
When the MTA was repainting everything, the RS-1s ,RS-3's C-420s received a yellow and Blue MTA scheme and passenger cars at that time were repainted into the lt gray and Blue scheme.The MTA continued an order for 8 additional Alco C-420s but these were delivered in the Blue and Yellow colors. The C-420s were repainted into the Blue and White wave during the 1970s when the GP-38s were on the system. The Bradleys were retired by this time.
so for Yanks Pride and anyone with any of these engines in the Orange and Grey sweep Scheme, using the Bradley cars in the Orange and Grey would be most prototypical.