i would as soon as i find out how many AMPs the Stock SR alternator puts out. and what other Nissan alternators require little to no mods for it to mount.
i never had a problem with me Z32 with 2 amps, dual maxima fans, and other minor add ons.
all i got in my SR is a 255 and 1 amp and im bottoming out on my sub. =\ so i don't want to put my altima fans if all im going to do it blow out my alternator.
so im looking at VG30De, NAZ 90 amps and TT 100 amp. and im sure the VH41/45 and VK have a bit more amps. the VQ30/35/40s should be at least 100.