It sometimes pays to look for "undervalued" cars. The herd is with the GTR. I have had great fun with "less than" cars. Ford XE exchaser 5.8 over better known esp 5.8, Ford f6 over GTP etc.
I think your parts list is good, you need rb26 pistons with the rb26 crank. I would get premium valve springs supertec/tomei.The nitto pump is fine. Probably better than the Jun.