I run a gm powermaster 140.
2 stereo amps, 250 mallory fuel pump 2, 10 inch fans, and hid headlamp transformers
basically a bolt on, but output terminal is close to the head (1/4 inch)
Thia alternator will put out 140 amps, the down side is it draws some hp.
I had a local rebuild guy put this alt on his test bench. he said about 8 to 10 hp to run.
With standard v groove pulleys it would eat belts.
Had to convert to serpintine pulleys.
If you need the power you need the power , but I would recomend a smaller output unit if you don't want to mess with the belts and pulleys.