.... So I spliced the the white (RPM sensor signal wire) and grn/bk (to tach) wires from the harness together and guess what? SUCCESS!

I made sure to cover the power lead from the OVP so it doesn't short out on anything. But if you're running sans EGR, there doesn't appear to be any reason to run the EGR module.

YMMV

-Andrew[/QUOTE]
I like this and would like to try it since my tach unexpectedly quit working. The 10amp fuse at the OVP is good but the OVP rattles when shaken. If I were to open the harness going to the EGR black box and splice the two wires you mentioned and presumably the tach works again is the OVP of any use anymore?