According to my I&T Shop Manual, the cold adjustment is .017 for intake valves and .021 for exhaust valves. At operating temperature, intake valves are .015 and .018 for exhaust valves.
The manual has two pictures showing which valves can be adjusted at TDC on the compression stroke of the number one piston and which valves can be adjusted at TDC of the number one piston on the exhaust stroke. I'd send you a picture of the picture, but I have no idea how to do that.
No distinction is made in the manual for gasoline versus diesel engines.
Tom in TN