I'm running a stock 60amp alt. in my 280zxt as well. I'm running a laptop hooked to a wideband O2 along side of my sds Em4-6f with a 2800cfm electric fan and haven't noticed any charging problems w/ my setup. I've got the usual other items that will suck up current as well as headlights, stereo, extra gauges, upgraded fuel pump, and so on. My alt. has always kept up, but I'm sure it's on the limit or exceeding it, and I'm running all stock wiring. I don't see you having any problems, but a lot of alt. shops out there can upgrade/modify your Alt rather inexpensively. I don't know how they do it tho.