Not sure about the grounding network but here are some pictures of the backside of a 69'dashpanel i had showing the ground straps from heater across to the guages,etc... Have a look,may or may not help.
David
http://FirstGenFirebird.org/show/closeup.mv?CarID=571 If i don't get this car back on the road soon i'm gonna go postal! On a quest for FGF knowledge 1968 Pontiac Firebird Convertible 1969 Oldsmobile Cutlass "S" Convertible *Sold*
![[Linked Image]](http://img78.exs.cx/my.php?loc=img78&image=69uncutdashpanel10266js.jpg)
![[Linked Image]](http://img65.exs.cx/my.php?loc=img65&image=69uncutdashpanel10276mj.jpg)
