I am totally unable to answer whether any one elses mold will function in your rifle. Also, regarding overall length, that is not a concern so long as the rounds will cycle through your gun.
If I were to make you a mold I would fit to your rifle, which is mandatory to be sure of good results without a lot of experimenting. Two posters have slipped in their comments and results with their 32 cal rifles. Happy campers because they got results, but what they offer isn't standard for 32 Specials accross the board, if my 30 years of moldmaking experiance mean anything. I would say my average customer, in those 30 years, has reported bad results with conventional molds. From the measurements I have taken of throat slugs, it appears this is true because they tend to run oversize more than say the 30-30's, which seem to be the easiest cartridge out there to get cast to perfrom well in when not knowledgable. Also the 32 has a slower twist rate, which requires better bullet guidence.
I have never had a complaint, but recieved all good reports from those who had me make molds to fit their guns.
Whatever your bullet is, use it as fat as it comes from the mold, if it will chamber easily. Also, experiment with some slower powders and you'll get better velocities with accuracy from the PB. 296, and 4198 are excellent powders which will give results far superior to the fast pistol powders.
Pay close attention to Hanks warning about using less than half a case full of powder. A stout load of fast powder becomes a bomb when doubled. I prefer to not use loads which can be double charged without running the case over. It's SO much nicer to clean up some spilled powder than to get an expensive ride from the range to the hospital, then have to buy a new gun after the months of healing!