If it's a 755A, then it's on a Browning design, and the takedown, maintenance, etc, will be similar.
Edited to add: I learned (the hard way) that older Savage/Stevens shotguns were manufactured with little quality control; many of them do not shoot to point of aim. And, I don't mean that they are a little off, I mean way, way off, with patterns centered so far from point of aim that those guns are useless for shooting anything beyond point blank range. I have 4 old Savage/ Stevens guns, and only one shoots to point of aim. Two are doubles, and while the left barrels are dead on, the right barrels pattern 30 inches low at 30 yards. I also have a Savage 30L (hence my moniker) that shoots 30" low at 30 yards. I used to have an old pump (model 520, I think) that shot 30" high and 16" right at 30 yards.
I tell you this because, if you want to shoot your 755a, your first chore (after inspecting it to make sure it is mechanically acceptable) should be to pattern the gun, to see if it patterns sufficiently close to point-of-aim to make it practical as a shooter. If it does pattern properly, by all means, use it.