Maybe, maybe not
Please READ this article
http://www.madelectrical.com/electricaltech/amp-gauges.shtml
Even if you do not perform this mod, it points up the pitfalls and whys of electrical failures in these systems.
AND Ma KNEW the wiring was marginal. 60-65A optional alternators DID NOT USE the usual factory wiring. Google up "fleet, taxi" wiring some time.
