I bought a 3 gage windshield pillar post for my '84 truck. Two of the gages will be the usual suspects, water temp and oil pressure.

I'm considering putting a fuel injection exhaust manifold with the stock screw in O2 sensor on the engine I'm building. The engine I've got is a "bowtie block", i.e., 85 and later. I'm looking at an autometer air/fuel narrow ratio gage. see here I'm thinking that it could be a useful tuning tool.

Anyone done this? Would it be useful, or just an instrument of self torture? <img src="/forums/images/graemlins/scared.gif" alt="" />

Any other ideas on what to fill the third hole with? Ammeter, oil temp, cylinder head temp?

Thanks