So I've got an older (92) 4x4 with the 22RE. I had coolant in the oil, so, not being bright enough to check places like this first, I tore the head off. When I took it to get checked out/shaved, the guy told me to check the timing cover. It had been quite eaten into by the chain, so I took all the timing gear off too. Now I've got a naked block, but the crosshatches are still in the cylinder bores, so I am not doing the bottom end. The head has been cleaned and checked and I've got a dual row chain conversion kit from LCE and ARP head studs on the way. I'm ready to start putting it back together now. I cannot find a bottoming tap in the right size, so can I chase the block holes for the studs with the old bolts (cleaned of course)? Can I use a medium surface prep disk on the block to head surface and front of the block? It seemed to leave tiny score marks when tested on a nonmating surface. Should I remove the cam journals and put assembly lube in there since they cleaned the head (I had synthetic in there prior)? Do I or do I not use a sealant with the gaskets? I've heard both ways now. Is there anything I should know about prior to embarking on such a journey? Anything in here I should do while its apart? My plan is to run it for a few hundred miles with the oil I put in it and then drp the pan to clean it out along with the pickup screen since the chain guides have crumbled in there. Does that sound reasonable? Any help would be appreciated.