orangemazdab2000
+1y
You will not be able to machine out the 626 to produce a dizzy hole in the front of the 12 valve head. You will need to find a Mazda Bongo, E2000, 4 cyl. 929 that has the dizzy hole in the front. You will also need to get the cam shaft from the same vehicle since the gear that runs the dizzy will be on the front of the cam. The 626 like you said has the dizzy in the rear, so that cam wont work.
My daily driver has a true 2.0 Mazda Bongo engine running a Megasquirt stand alone ECM. My project Lowx4 has a Ford Probe 2.2 converted to a "Bongo", running an '89 Mazda 626 ECM and modified harness. My project green machine has a Mazda 626 2.2 converted to a "Bongo" with a rare carbureted manifold (sent to me from Finland) with a Weber 38 on it.
I also have one more true 2.0 complete Bongo engine in pieces, and one more cam, cam backing plate (where the dizzy goes into), and a true Bongo intake manifold for another conversion.
As far as putting a 2.2 in your 2.0 truck, it will work. transfer the intake with carb straight over. Exhaust and accessories too.