Gage Cluster Interchange

[beaterC10]

I scored a reasonably priced tach cluster for my 86. The cluster itself is for an older truck since it has a mechanical oil pressure gage, voltmeter, and 100 mph speedometer. I also recently scored an 81-87 tach that works.

My plan was to use the 81-87 tach, my 86 speedo, and an 80 psi mechanical pressure gage I have in the older cluster. That would give me a cluster that has matching graphics and an oil pressure gage that doesn't peg.

Would this combination work? I know the speedos will interchange and I assume the tachs would also. I also assumed that if I remove the sender for the electric pressure gage that the wiring to the gage won't matter.