66 barracuda formula s tach HELP

I am using my factory tach, just changed the board in the can. With factory points
Capt46- what are the factory tach with module and wiring worth? I know you have sold quite a few parts in your day... any idea?
I'm going to keep mine for now and use the CS159 indash tach sold to me by Vans on Ebay but if it does work out I possibly will sell the complete assembly down the road.
(please people dont hound me to sell - its at least 1 year away lol!)
Thanks,
Joe