318 rebuild for turbocharging

Ah OK you are right then T56 my understanding of boost reference was wrong I thought they measured with respect to pressure outside the engine.

I thought some more about the cam too, I like the idea of a solid flat-tappet with the special lifters that direct oil to the lobe face. Is there any reason to go with hydraulic vs. solid on a boosted engine, aside from needing adjustable rockers etc?