Tony;
The AMP indicator is not "measuring" voltage drop so much as
indicating it when it occurs...and as I stated, some minor voltage drop is inherent and unavoidable (it must occur and is intended,
by design across a fuse!), but when this increases due to (unintentional) corrosion or the other known causes at the Fuse Block, then a FB refurb is called for, and I offer these...it is good practice and recommended to install a refurbed FB to safely handle the increased currents available from an uprated Alt!
I have yet to hear of an electrical fire after an alt upgrade, and I wouldn't want you to be the first...not when all the weaknesses and areas which need attention are
well known!!!
See related info about heat from voltage drops:
http://www.sw-em.com/tech_bulletin_3.htm
PLEASE try use punctuation and grammatical breaks to make reading your posts simpler (and allow readers to occasionally breathe)...
you know when you want the breaks because
you wrote the post...but readers need these to know also, and the way we know is by your use of punctuation...
Cheers