Thank you folks, I really appreciate the help. I guess yanking the prechambers is the next step. Time for a Peach Parts order for seal rings and heat shields.

Could my turbo seals be shot and leaking oil into the intake? Oil would act as fuel and could cause my pinging, could have carboned up or damaged the prechambers, could be causing the clouds of blue smoke at startup. Might be worth yanking the turbo and checking for oil in the intake. Scary thought, what are the odds of a runaway engine?

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap