I took all the old worn out vacuum lines that went to the charcoal canister along with the canister which was broken anyway. My vacuum went from 12 lbs to 20 lbs. We don't have pollution inspection here. Where they have inspections on older vehicles such as this truck they only require that you spend $50.00 in an effort to make it match pollution standards. This amounts to the cost of tune up parts.

 

Our wonderful governor just repealed vehicle inspections for the state of Oklahoma. Just have to wait until August for the bill to become effective. Ours was just a mechanical inspection for anything pre -79 anyway.
1977 F-100
300 I-6 / C-4 (soon to be AOD)
Offy intake w/Edelbrock 500CFM
Hooker Ceramic coated headers w/duals
MSD6
Whiter whites/Brighter brights