The casting number has been ground off this 261 head. Has anyone ever seen this and know why. The date code on it says it is a 55 261 head. I have no history on the engine other than it was painted a light metallic blue when I got it and had a rebuilt by (the only thing I could read ) sticker on the block. Just something that I seen when I overhauled the engine and wondered why someone would do that.
51 GMC 100 with 59 chevy 261 under the hood. 3 on the floor with 3.42 gear.
