Iggy's right even if you have to cannibalise both to make one work one (which I hope you don't to).
What monitor have you got for them? How do you hook them up onto a screen?
What other peripherals do you have?
If you were is OZ I would set you up with a A1200 keyboard (I have one spare although its a bit yellow).
But after the keyboard you will need a HDD, maybe 3.1 Roms, and a Scan doubler (i use an Indivision AGA) so you don't have to worry about old monitors blowing up.. (which happen to my 1080 yesterday

) and ofcourse a good joystick or two.... which brings up a question you got a mouse for your miggies?