Gauges Again

[bls-fla]

I have a 1990 Grady Gulfstream with 2000 Yamaha 150 HPDIs. I'm swapping out the gauges and have gotten conflicting info on what I currently have. I have attached a photo of my instrument panel, does someone recognize it? I think they are not originals, the tachs and speedo I mean.

[boats.net]

If the tach has two square off white colored conectors on back of tach that connect to harness going to engine it should work.