Thanks ! I have the Autometer Tach diesel adaptor already hoping it would be 3 pulse per revolution compatible. Unfortunately it requires a 4 pulse per revolution tach. Thanks for the reply looks like I'm just going to order a 2-5/8 " diameter 4 pulse per revolution(8cylindergas) Tach.Here you go:
Auto Meter 2888 Performance Tachometer https://www.amazon.com/dp/B000CIJ4AM/ref=cm_sw_r_cp_apa_PL1YBbZ1J15TA
Thanks for posting your build . I completed a 1hz h55 swap on my 60 last year ... runs well but will need to upgraded later when it needs a rebuild ...to a turbo .