Ha! Those are my old carbs, they've traveled all over Australia now. Great clean setup they are, and in awesome condition. Good to see them around again.

Out of interest was this engine black before?

If you want to give a turbo setup a go, draw through would be easier. But I guess it's up to you. You can intercool with blow through though.

It's a bit hard to tell about the cam without knowing manufacturer or the specs, maybe google the grind code and see what comes up?

Either way if you want to sell those carbs to fund the turbo project let me know!