Just remember, in the US, that 70cm data must fit in 100 kHz and be 56 kbauds (Same on the 219 Mhz band), but this is interesting work. 97.305(c) and 97.307(f)6
We don't have such blanket restrictions here. Operating under the amateur radio regulations for individuals, you can do whatever you like within the limits of the band and conforming to established bandplans and social behaviour. With a special permit for unattended or automatic operation (required e.g. for a repeater) you get a frequency and bandwidth assigned, no technical details like a baudrate.
Rob