Well, I had already talked to him on the phone, and he turned out to be an old semi Cornhusker fan, so I didn't have the heart to tell him not to fix it. I guess I'd rather see my money go to a small business than to LMC.
That being said, he just called me now. Apparently the early tachs (1973-1975) are different than the later models ( this did come out of a 1976, but being a 38 year old truck, it's anyone's guess where it actually came from...). He said the early ones are an additional $50 to fix. So I am going to have $225 plus the cost of shipping there and back in this. Oops. At least now I know. Next time I would just buy an LMC one if I was replacing a bad tach, or one of those aftermarket ones if I was replacing a fuel gauge with a tach/fuel gauge combo.
You live you learn. That bring said, other than the price, I have nothing bad to say about the guy. The customer service has been good so far. I'll update this thread when that actual tach comes in.
Martin