Do a cooling system pressure test as well. That may be telltale about HG before a cold wet compression test.
I'm guessing you don't know why it was there for service, but it sounds like you are doing the right thing as you move forward.
Congrats on the find!
I'd be curious what then VIN is on yours as well as the build date.
Mine is also a 96 build date of 8/95, black and also has the chrome package (door handles and mirrors).
At one time I thought it was one year only and rare, but apparently it's 95 and 96, black only, and no one wants the chrome anyway. I happen to like it! I just wish mine was triple locked like yours apparently is.