Hi All,
I'm doing the under dash stuff and it's been enlightening.Who would have known there was a filter in the vacuum motor?
So now I don't know which holes in the firewall to use for which one.I had nothing to go by and can't find a picture of the firewall.
Any advice would be greatly appericiated.
Thanks
Cheers!

 

See if this helps. The speedo cable and the choke and throttle cables come through together through the large hole near the center at the indent of the firewall. There's a grommet available to seal it up.
The vacuum hose comes through just above there, a little to the right. You can see it going down to the carb.

 

Thanks 52 Merc,
This picture is going my favs.
It might be wishful thinking....but maybe next year I could coax the ol'239 to get the truck to Tri-Cities to see your Car Show.
Thanks again and all the best!