Not a direct answer to your question but may shed some light ---- I needed a cylinder for a 1917 frame which was originally .45ACP. I got a 1909 .45 Colt cylinder which turned out to be too long. I had to deepen the recess in the frame (where the ratchet turns) about .010-15" (my estimate, not measured) to accommodate it. That introduced the problem of the hand sticking out to interfere with closing the cylinder, which I dealt with by dinging the frame so the hand didn't lean out so far. Minor timing issues were dealt with normally. Shoots good. See below --
Indeedy...the 1917 Cylinder is shorter than other New Service Cylinders ( to allow the more generous Head Space for the use of Moon clips with the .45 ACP Cartridges )...and the little 'Lug-thing' ( sorry I do not know the proper name for it! ) on the side of the Frame which limits aft motion of the Cylinder when the Cylinder is open, is wider on the 1917s than it is on other New Services.
If the Revolver is .45 Colt, I would suggest you find a .45 Colt Cylinder to keep the replacement procedure more forthright.