The timing would move ahead some when the epump is running. you would know if timing was too far advanced by the bad noise and when you put the pedal down and it slows down. The 4d56 exhuast manifold has a convenient egr port on the number four outlet to block off and insert temp gauge I use. Trying to decide if there's advantage in running the egr-less 4d55 intake on the current build. On the 56t delica I never saw above 1100F steady mountain climbing but I hadn't turned up fuel very much.
Is there somewhere on here you've shared the rest of your set up? What are you running for injector nozzles?