you should have everything u need to do the boost gauge install. i dunno about the oil press one though, but i hink you should be fine.
dont forget, the autometer egt doesn't come w/ a probe, you hafta order it along or seperatly with the egt gauge. alot of ppl reccomend the westach egt probe, which seems to be much more sturdy than the autometer one (and its cheaper too, i think)
that should be all u need
of course you will need those T-fittings to tap into the bov line for your boost gauge.