Evaporative Emission System (Evap/em): Fuel vapor valve(s) located at the top of the (tank(s), Vapor hose(s) route from the valve(s) along the right (passenger) side frame rail to the charcoal cannister.

Cannister has valve w/a nipple on it, corrogated paper hose routes from valve to a straight plastic fitting that twists into a hole on the side of the air cleaner.

Same basic setup: 1977/79 F100/350 351M/400/460 / 1978/79 Bronco 351M/400 // 1977/78 LTD/Grand Marquis/Lincoln Town Car/Mark V 351M/351W/400/460 / 1979 similar except there were no 460's in Passenger Cars after 1978.

1977/79 Econoline 351W/460 also similar but there's next to no room to see any of these parts under their hoods.

Hmmm, I see Speed Control in the above pic. When vehicles came w/optional Speed Control they usually came w/the optional tilt wheel feature. Does your truck have it?

I read thru your posts, didn't see any mention of it.

Be aware that the tilt wheel is operated by the turn signal handle. Gently press the handle forward, if it has tilt = BOING!

You may have to wiggle the wheel a bit while pressing the handle forward, because more than likely if has a tilt wheel, it hasn't been operated since Carter was prez.

You'd be amazed on how many peeps are unaware their FoMoCo vehicles (1965 and later cars, 1978 and later trucks) have a tilt wheel. AMC/GM/ChryCo used a separate steering column lever to operate it.

FoMoCo didn't have a separate lever until 1981, then for Escort/Lynx initially only. F150/350's didn't have a separate lever until the 1990's.