A bare minimum for your bottom end IMO would be VTEC oil pump, ARP rod bolts (evidently Summit is wrong and you need the 8mm not the 9mm) VTEC pistons (anything from a B16 will fit with no rod modifications, ITR/GSR will fit after you shave your rods). With that you should be okay. Of course that list includes everything you need to do when changing pistons. If your bearings are worn, the build is a good time to change them while you have everything out.