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bluetops in a 4 cylinder good for 150 hp at the crank boosted

That sounds about right to me. Very roughly half as much power from half as many injectors. In my stock Isuzu G200W 2L engine I get 80kw (107hp) at the wheels unboosted. Would need to watch the injector duty cycle and limit boost when you run out of fuel and as you say look in to that injector upgrade. Siemens deka are often used and have good data available for the Delco. 60 or 90lb. Idle is fine with the 808 swapping to single fire mode at low rpm.

dizzy blank looks awesome man good job.