It all depends on overall length not if it’s a 150, 250 or 350.
My f250 was a regular cab 8’ box. One can get a 350 reg cab with an 8’ box too. Same basic overall length
If one had a 4 door crew with an 8’ box that is Looong.
You should google the differing vehicles for comparable overall lengths to a 20+’ van.
My Promaster is idk a lil over 19’ I think. It was within a few inches of the same overall length of the 250 so I had that as a direct comparison.
An fyi: many of the beach side parking lots I see prohibit vehicles over 20’ which excludes all of the longer wheelbase vans and pickups.
intjonny
