After a bunch of research I still have no answer. I am looking for the name and code of the yellow used on the later ('56 to '60) 261 6's used in the 6000 series trucks. From late 1960 on to the '64 replacement motors, I believe were painted green.
The Filling Station says they were only painted blue. That is not correct. Some of the reputable places I have called, have never heard of a yellow 261. I am not talking about the Yellow/Green used on the SB V8 265's in 56 to alert that the motor was not a 283 either. BTW, Bill Hirsch out east doesn't know the color either.
If I can't find an answer on VCCA, I may just go with either a Calypso Yellow or Colonial Cream since those were colors GM were using on cars during this time period.
Fairly new to the Chat, so I am hoping I have posted in the right area. The 261 motor I have is a 1959. THANK YOU!!