well, "stock electrical" basically indicates the stock alt and a single battery in the stock location. iirc, both my yotas had power issues in the 600watt+ range without upgrade. the 86 got dual alt. and 3 batteries, and the 90 4runner just got the "big3"...... before big 3 was a known term. heck, even at the shops up here, they look at a guy funny at that term, and just call it part of the power wire install. yes, it will run without the big3, but not well or reliable as it should, and it is not quite as involved of project as you think. can you please share/e-mail me the manual you have? i would like to read what you are reading. i would also like to see the board, to be sure that it's the same as gen2, and not gen4. gen 2 is basiacally the same build as the ppi/mtx 225's. and regarding the fusing, it was pretty common for amps to have multiple fuse ratings for different impedance loads, as well as some others also including needed additional cooling. this kind of info sometimes was only found in the installer manual, though, not the end user owner manual..... yes, that thing has it's collector value, and chances are, it is going to need to be re-capped in time, if not already, but the point of those amps was to run lower impedances to find it's real power. i don't know how old you are, but chances are, that one your buddy had in high school likely was on a pair of 4ohm subs, or 4ohm mono, which would only make the amp draw about 20-30a at the most, and maintain more like 10-15a, which is ok for stock wiring complete,and a single run of 8awg. kind of like using the power window with the headlights on. you obviously care about the amp, so do it a favor and don't starve it. can you tell me exactly what scares you about the "big3"?
