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Ok, I have an '87 GN, bored, balanced, blueprinted, ported, polished, polished rods, .212 hydraulic cam, 55lb injectors, stock intercooler. Turbo was leaking oil into exhaust, so I ordered new 6368 BB turbo. I also have an '87 T-type with te-60 turbo, 60lb injectors, ATR .202 (i think) cam...

I understand the need for ZDDP for initial break-in, but am curious if it's important to add it with every oil change indefinitely. I'm working out a deal on an '87 T-type that runs great, but hasn't had ZDDP run in it for the last 5 years and many miles. Should I start adding it with every oil...

I'm wanting to order a new chip from Turbotweak, and know my cam, stall, turbo, etc, but only know that my injectors are 50lb. This number is engraved on the side: 154 45/5 624. Does this mean anything to anyone? I suspect that the "154" is for WOT (stock + 20%), but have no clue on the rest...

This is my first post, so I'll try to make it a good one. My idle is rough, and the car pulls pretty well until it goes from vacuum to boost. I've checked all the vacuum lines, intercooler hoses (it's an '87), plugs, wires, and set the tps. When I go to boost, the car will pull really well, but...