How do you set the timing on any engine with a distributor? With a timing light.
You do have to pull the EST wire connector apart.
From that jeep forum link you posted.
>>
7. Pin B - is the override cranking signal pin. This pin needs a wire connected to it that runs to the GM distributor connector wire that is tan.<<
Whatever that means, but it goes to the EST port on the ECM.
That wire is Tan or Tan/Black strip. There should have been an in-line plug, that needs to be separated in order to set the base timing of probably 6 deg. When you plug the tan/Black wire back together, the computer will move it to where ever it thinks it needs to be.
Have you checked for fault codes on the ADL plug?
One very common problem with these type of conversions is poor grounds. You must have good grounds between the engine and the frame and the body and the ECM.
