I dont know if he still has them, but thomas4parts on ozgemini had a batch of MLS head gaskets made up for the g200w, if you wanted to go that way, and ive taken measurements and it looks like sr20 pulsar GTIR SR20 head bolts will fit (ARP part number 202-4303). The standard SR20s are M11, but the Pulsars are M12 as are the g200w.
thomas4parts:
http://www.ozgemini.com/forums/tech/pro ... le&u=14759other interchangability details:
http://gemisa.net/forums/viewtopic.php?f=24&t=43For the diff, the altra-9 LSD kits are awesome. I retrofitted the sailsbery diff to my TX with one of those centers and everything about it is awesome. As for ratios the DOHC gearbox is closer ratio than stock, but they are hard to find if there isnt one on your engine allready.