You will probably have to rework the extractor notches in the breech and possibly the carrier angle.
IF the 44 Colt OAL is the same as the 44 Special then the carrier will feed it. but the extractor will not go deep enough to pick up the rim.
I just converted my 45LC Uberti 1860 Henry to 44 Rem/Colt C.F. (44 colt brass and a heeled outside lubed bullet of .451 Dia. My Henry will now feed and extract 44 Colt, 44 Mag and 44 Spcl brass, also 44 Russian brass, but all will feed and chamber great except the 44 russian with the above bullet is too short and the carrier jams on the last two cartridges. I have to rework tyhe Carrier forward angle to push the cartridge back into the mag, like it does on the correct OAL cartridges. I intend to get a second carrier to use with 44 Henry Flat C.F. (44 Russian brass above bullet) for when I shoot Frontiersman with my 2nd Gen Colt 1851 Navies.
I re-chambered(read sleeved )the chamber with a 4140 sleeve and I had to rework the extractor notches to pick up the small dia of the 44 colt brass. It works like it was made that way now. Slick!