In pickup motors, the 360 is identical to the 390, except for the crank, rods and pistons.

Anything that will bolt up to a 360 will bolt up to a 390, and vice versa.

The 360 (pickups only) used:

--the 390 block, with the 4.05" bore.
--same cylinder heads and 2bbl manifold as the 390 (no 4bbl 360s as oem).
--the 352 crank, with the 3.5" stroke.
--the 352 rod, slightly longer than the "all other FE" rods.
--the 390 car piston. People here have reported both the flat top and the dish top car piston. Both have valve reliefs. In car engines these pistons were good for 9.5 CR for the dish, and 10.5 for the flat top. These car engines were intro'd in '66 and held until the end of the FE in cars. Earlier 390s had slightly different specs. More here:

FE Series Engine Specification Chart

The shorter stroke, longer rod and 1.77" compression height of the 390 piston resulted in the .100+ sunken piston and low compression, just what Ford wanted for a pickup engine.

The pickup 390 used the same crank and rods as the car motors, but used the 410 piston, again resulting in the piston being down the hole about .100 as the 410 compression height is 1.67" vs. the 1.77 for the car 390.

If you are going to build a performing 390, you must make sure to spec CAR pistons, not pickup pistons. (Or spec 360 pistons and install them on the short rods and longer stroke of the 390) That is if those cast, dished pistons meet your specs for 9.5ish compression. If you are going to really run this thing, consider forged pistons.

 

Of course, instead of taking apart old engines or buying buttery cast repro pistons, you could:

Survival FE Engine Kits

 

get as much stroke as you can afford!