Re: 14 bolt FF in a \'75 Chevy van???
Yeah, but you'll have to move spring perches and shock mounts.
It is supposed to be about 3" wider to match the front axle but all this is relative. My 14FF out of a 3/4 ton 2wd Chevy is 1" wider WMS to WMS than my rear 10 bolt and 1 3/4" narrower than my front 10 bolt.
The problem I see with a 14FF is that you need 36" or bigger tires to clear what a 33" tire will on a 10 bolt. So unless you need the beef for the big tires then I don't see a point in it. Especially for the extra 200lbs or so.
My current plans as of right now is to buy a couple Lock Rights for my 10 bolts sometime this fall. Can't beat the price. However, I have a line on a 3/4 ton with 14SF/10 bolt, 350/SM465/NP205, and a plow for a decent price.