Ehm, the A3000T also does not have the INT2 line; at least not all of them. It is unclear if some of them do. I have a 3000T rev 6.1 mainboard which had no INT2.
I can not say if a MK2 will work; probably will. My MK3 did work, but without disabling it's SCSI it was very unstable. Anything which opened or looked for SCSI devices would crash finding the cybppc.device. Think of HDToolBox, Quarterback etc. Adding the INT2 line fixed all problems.
