Thanks and help

[chunk40]

I want to start off thanking everyone for all the great info on this site.....i also want to say sorry that I have not been posting anything either......once agin I need to pick some brains.....the engine in my 69 gmc has been a conversation and its about time I figure out what it is.......on the drivers side on the back of the block I found this...GM50LG.............the head number is 14022801.......the numbers on the pad behind the alternator are V0716UFC and just below it is TGF732556................help please..............losing whats left of my mind