OK all you electrical gurus this one is for you. I am planning on swapping the idiot light dash out of my 70 and putting in an LS6 dash. I know most everything is in place and ready to go. The only thing I have to add is the wiring for the amp which is no big deal. The only thing that has me concerned is the stock tach. Right now, I have a Sun Super Tach II running off my MSD 6AL box. How do I make sure the stock tach will function correctly with this setup. It has an HEI distributor in it as well.