I would say an hour and a half of searching is enough. I get all kinds of search results on 280ZX distributors and such but not what I need. So, sorry for the forum clutter but I still have no tach...

The MSD6AL is installed under the dash with a custom mount to the fan housing. Red and Black power are direct to the battery. White wire is direct to the wire coming out of the distributor. Black wire is direct to the negative side of the coil. Orange wire is direct to the positive side of the coil. Red wire is to a black wire with a white stripe coming out of the harness right by the coil mount.

The MSD6AL appears to be working, but of course the coil is not working. I have the MSD 8910 adapter but when I hook it up as directed by MSD I still have no tach.

MSD says to hook up the tach adapter inline with the red to red and white to white. The car starts and runs with this set up but no tach...

Edited September 24, 201212 yr by conedodger

I think

[MSD 6AL]----white ---- ----- Red ----[MSD 8910]---- white --- ---- Black/White ----[TACH] ---- Green/White ----[ignition]

We had to use MSD 8920 adaptor for my dads '72 but we were triggering the 6AL with the magnetic pickups from a 83 zx distributor. My '74 is setup the same way with the stock distributor. (Magnetic pickups also)

I'm told I need to use the 8920...