What makes you think that you need a larger alternator in size for more
output? The case size does not need to change.

In article , "
wrote:
I would tend to agree that the 100 bucks or so would be better spent on
upgrading the alternator, however, in my case, GM didnt spare an inch
cramming the LS1 into the firhawks engine compartment. There literaly
is no room for a larger alternator.