Did you rod knock before?
-Anyways, to answer your questions...Ive used Top-Line Oil pumps, work fine for me. I would just shim the Oil pump for the + oil pressure.
-Depending on how much you are going to machine the head (resurface/deck block), that would tell you what size headgasket to get. If i had another chance to rebuild my 7M, i would go 2.0mm Stopper MHG. I blew my headgasket and didnt machine much off, so i stuck with a TMS 1.4mm(120shipped) MHG torqued on ARP head studs(110shipped). Be sure to torque to good specs, as i torqued mine to 92ftlbs.
-ARP rod bolts is for good insurance IMO, cause at high revs and high way pulls for 7M, i would go ahead and get ARP rod bolts.
- I also used Clevite bearings for my main/rods/and thrust washers, some of the greatest bearings you can get for a 7M IMO + for good prices too.
-tap and clean the headstud holes.
-change all coolant hoses of course
(better safe than sorry and + insurance)
thats all i can really think of right now...sorry not much help, but maybe a little of this can get you somewhere.