EFI for 350 Chevy

[OliverH750 at aol.com]

Hello all,
     Are there any GM EFI experts out there?  I would like to convert my '85
Chery truck to EFI.  I have a complete system from a 90 Chevy Truck with a
305.  I also have parts from a 454 Chevy truck.  I want to use the 454
Throttle body with the 305 controls.  Am I going to need a 350 chip, or maybe
some 350 sensors?  Is there a difference in size of the throttle bores
between the three engines?  Any help you could provide would be appreciated.
 Thanks in Advance.

Oliver Harris