Newbie question
Fleet Mechanic
Joined: May 2012
Posts: 1,724
Likes: 1
From: peru kansas
lil smokey it all has to do with your gears and tires i am running 3.42 gear rear end and 285/75/16's and what i have found out is another big help is a good spacer under your carb that helps with fuel atomization don't know if it helps to much more but ever since someone sabotaged my first 390 my carb gasket has a brass screen in it i put aluminum 4 bbl intakes on them (in the case of the 7 deuce picture top left) i have a 1" spacer and then a 4bbl to 2bbl adapter (adds about another 3/4") and a stock motorcraft 2 bbl and if i cruise her nicely down the highway i get 16-20mpg i once got an average of 22 driving to Arkansas city ks (about 70 miles) drafting a semi but if im hot rodding it around it gets 8-10 and if i pull a loaded trailer with 5 rick of wood (about 10,000lbs) i get about 6-8 i love my girls they keep proving themselves time and time again and that is why i love the FE motor family
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
Dual piston caliper disc brakes were an extra cost option for 1968/72 F250 2WD's and F350's.
1976: First year for disc brakes with 4WD
Originally Posted by NewbieTruckLover
I will look 
for a 300.
for a 300.Both engines look identical and share the same block casting numbers. So how can you tell one from another by looking at it?
The 4th digit of the VIN is the engine code. 1966/74: A = 240 I-6 / B = 300 I-6.
But, who knows after 40+ years have passed by if the engine is original to the truck?
The only way to know which is which, without tearing the engine down, is by measuring the stroke: 240 I-6 = 3.18" / 300 I-6 = 3.98."
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