I have seen 4 factory stick Monte's. All of them were originally 305 4 speeds. I used to look for the 78-80 Monte's in the junk yards because they typically would have options on them that the Malibus wouldn't (delay wipers, gauge packages, cruise control, bucket seats, etc. In all the years of looking, I have only seen one with a Buick V6 and it was an 80 turbo. Seems most of the 78-80's around here either had the Chevy V6 or the 305. Not sure why. Here is one of the ones I saw .I have yet to see any factory stick Monte's in western Pa but somewhere out there a few could be floating around.