will have to modify frame for engine mounts.

trans cross member will have to be modified or replaced.

 

351 stroked to 393 will perk it up. Not that you asked just that it would be cool to say you needed more power so you swapped in the Ford

 

length

Fords are more work, sometimes the Mustang Ii kit crossmembers have to be modified because of the front sump oil pan and the rad to fan can be a problem. There are good reasons for chevy engines being the most common swaps. ,I got a lot of static back years ago when I was an engineer at Ford and drove a Buick Nailhead powered Willys to work most days. But It had a 9 in Ford rear, Ford T 85 trans and Ford wagon front brakes

 

Due to Ford's longer bell housing, it is common to have to re-work the firewall also.

John

 

I would be worried about the space available between the firewall and the radiator. I'm a dyed in the wool chevy guy, but I think the ford engines are a little longer. This might require some firewall modifications.

 

Maybe not, one advantage is the Ford having a front mounted distributor. Another thing like Chevy's the Ford SBF's also had a long and a short water pump. The early short pump and matching harmonic balancer were used on 1965-69 289's that had the 28 ounce balance factor which the 351W has always had as well. Here is a thread I did years back (see post #5) https://www.jalopyjournal.com/forum/threads/sbf-short-water-pump-pulleys.303600/ These short water pumps were also used in 1966-77 Ford Broncos and 1969-74 Econolines to shorten them up.

 

Here are a SBF and SBC dimension diagram for starters.
Similarly with a little effort you can find tranny dimensions which will give you a pretty darn good idea what will work for your engine bay and more.
You have not mentioned which tranny's are involved that I recall.