The Brownie is not a factor on your truck-I only mentioned it because it's keeping me from being able to check the operation my new vacuum speedometer shifter on the road. If you can look in the assembly manual,there's probably a picture of the OEM mechanism;it'll be easy to figure out how to make what you need from that.
Speed


1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck