Every time this topic is posted (about once every 2-3 months) I hesitate (for a second) to respond. This is a lot like discussing what is the one true religion (I think).
In an article in the November 1998 "Pickups 'n Panels in Print", Bob Adler states that PPG 34560 is a "fair current match" for the 216 and 235 (pre and post 1954) gray truck engines. Bob quotes Robert Hensel who quotes "Chevrolet Service New Bulletins".
The 261 was green in some years and yellow in other years and either green or yellow in transition years. The green was nice but I do not know a number. Jim Carter sells the green and his gray for the 235 looks a lot like the F..o..r..d engine gray.
Tim
