do it . just do it
even as a stocka my r32 gts4 it great fun. with a switch on the 4wd you've got the best of both worlds. mine has run near the 60fts times than my old 32 with a rb26 on full slicks did, it just didnt have the power to carry it after that (thats soon to be fixed though )
now that the 15yr thing is dead id say they might go up again. id say 13k mark maybe lil more with mods