Sending units can be extremely specific, or pretty generic. You may try getting the voltage map for the Boost and trans gauges (or find out what max voltage at max sending unit pressure / temp is). If they match, then they can be interchanged. I would suggest changing the sending units as warranty may be voided if you do not use the autometer sending units.
IIRC the pyro probe is one of 2 types (K or N??). But once again changing it should be considered for warranty.
Wiring is going to be similar. Pyro should be 2 wires. Temp and boost could be either 1 or 2 wire sending units.
Someone here may be able to tell you what the sending units for the autometers use for wiring. If you have 2 wire units now and the autometers are 1 wire, just abandon the extra wire. If the other way, then you will need to add new wires.
