MSD digital window switch
https://ls1tech.com/forums/lsx-parts-sale/602014-msd-digital-nitrous-window-switch-sale.html
Thanks.
I think I got my info on how to wire it for the LT1 from CamaroZ28.com.
If you are a member there do a search on how to wire MSD window switch.
Use 8 cyl mode you can take a Tach signal comes from the PCM or negative side of the coil.
I was running an MSD 6AL ignition on my 95Z and I took the tach signal from there.
Try this web site for the PCM pinouts:
http://shbox.com/page/index.html
This diagram shows the tach signal from the PCM it on wiring diagram 4
http://shbox.com/1/4th_gen_tech2.html#1995_pcm_pinouts.
It will work on LT1.
I hope this is of help to you.
http://www.nitrousoutlet.com/catalog...product_id=964
Dave

