x2
Its pretty easy to put an engine in......if you had a whole 1/2 cut it would be piss easy
also wiring isnt rocket science, you could get away with it for a 3 day weekend (if ur a noob at it) hire of an engine crane / stands or even just some tyres.
Day one remove RB25, take out rb26 and put in Rb26, start bolting shit up, ave a few beers
day 2 start wiring, possiably get running
day 3, finish wiring / tidy up, drive
I dare say it will all be plug and play as far as the looms go, IE plug for dash / fuel pump plugs / plugs in engine bay are same....But im more familiar with R31/32 looms, and R33 gtst, never played with r33 gtR
-Jez