According to my service manual, It says the G52b and the 4G52 engines are both U model 2.0 engines, The only difference that I'm seeing is that the 4G52 is a non jet valve head.The G52b I have in my 1st gen needs to be rebuilt and I was thinking of replacing my engine with a 4G52 instead because i heard that its is a better performance motor.I still need to take my motor apart, but i feel like the Jet Valves are what caused my G52b engine to fail.

Does anyone know if my distributor, alternator, starter motor, and wiring harness from my G52b will work on a 4G52? Can anyone provide me with any info on the difficulty of swapping in a 4G52?

Are the benefits of the swap worth the trouble if my ideal end goal for the trucks engine is to have a John baker cam twin side drafts, and a Header?