DC tac hook up..?..

I don't know were you are finding 500 dollars...........especially if your just going to keep a eye out and get the parts as they come available.
Ebay had a dist for under 200 dollars and the generator is more then likely a form of the 20 dollar speedo cable electronic generator off of a GM product.
Remember quoted me 325 for a rebuilt distributor and showed me a eBay post for one of those modules for 125. This is without shipping and without knowing if my tachometer even works and also that module or generator they don't know if that works either..
That's where I'm getting my figures from..