Tach wiring to fuse box for keyed source, is it possible?

[greenpigs]

   I don't want to splice into my feed for the ignition switch, my old harness was a cluster of half assed splices. I did a search here and on Moparts and found you can use the fuse box, but I am not sure what part. So does anyone know what I can use and is willing to share?

[mikepmcs]

how about instead of splicing into the new harness you just tap into it with a jump connector. 
is your fuse box the original old one?  if so, I can't see where you could do it without it looking unclean.
I would just find your 12v ignition source and use one of these.

[Just 6T9 CHGR]

Use the radio fuse & get some glass fuse taps....

[greenpigs]

  I didn't know about those and hopefully others pick up on this cool "trick" item.
Since I do not use a radio would running a 3 amp fuse like the manufacture recommends for the Tach be a good idea instead of what the radio is rated at?

[tan top]

there is a piggyback spade conectors for accesorys  at the back of the 69 fuse box ,  forget now which one i connected it to  ,  will have a look later  , think i just followed the FSM 

[Nacho-RT74]

3rd gens have an acc source on harness which is in fact the source for the tach!... dunno if earliers too