Hmmm very hard to work out, I'll put up a pic. We run both and their both as easy as the other the pull out n change...
If your 361 has a rim n spline sprocket, then to run the 28 inch bar on it successfully, I think either you could change out the rim to a 7 tooth one and that will lower the speed at which the chain goes around and give you good power distribution for the longer bar OR you could swap it out for a 9 tooth rim and that would give you faster chain speed but with loss of power and I think excessive wear on your 361...
Alot of blokes round here change out the rim on their bigger saws here when cutting pine to a 9 tooth one for the faster speed - BUT only for pines and softwood. If they tried that on our Euc' hardwoods the saw would be toasted.