How do you have it hooked up? I still run my ignition box on the 79 standalone variety. I would think that you would have to use it somehow or the distributer just wouldn't work. If it's not hooked up ay way to the ignition module, and the tach is jumping around, then there must be a problem with the MSD. Could be the tach adapter.

Jim

I didnt hook it up PO did, gonna go thru and verify everything soon, my understanding is that the 6AL eliminates the ignition module under the dash, is that not so??

I can't see how it could. There are two wires (I believe red and green) in a box on the fender well by the coil. These go to the ignition module. I belive that the red and black wires off the MSD hook up to these, the the black and orange to the coil. It's been a while, so don't quote me on that.

Jim

How about the distributor pickup?

got it fixed, replaced ecu and half of it stopped, but then other things showed up, dizzy seems to have been the main prob!