rb swap along with transmission into 95' 240sx

[Mikojai]

i just bot a 240sx off my buddy, an automatic 95' and im swapping a rb25det in there along with a manual trans, would i have to drill my own hole into the firewall or, i heard from my professor that car manufacturers don't build two different firewalls for one car just because of its transmission. is that true? and is there anyone in the Chicago area to help? that has a 240 with a SR20? and also beside from the stuff that comes with the rb25det engine what else do i need?

rb25det-engine,turbo,maf,ecu,manual trans,etc...

do i need-skyline r33 gauge cluster-what clutch, and break cylinder to get from-greddy mani-etc?

[Carl H]

no hole drilling needed but a conversion harness is.