I'm trying to include a link for pics with this. The "Forgotten 261.." lists 261 colors as: green - some later yellow. You can see the yellow paint on the vlve cover and intake in these photos. There is also some on the head, but I can not find any on the block, yet. You can also see the head and block casting numbers as well as the oil exit, return and peg in the block. Note the peg is flush with the block surface. I pulles the starter and the casting date is: D3 3.
http://s858.photobucket.com/albums/ab147/jdaniel171/Check 6
Joe D.