not sure on the resistor
i just get the small globes used in old school dashes
or the ones used in late model car blinkers
just goto wreckers and cut the wiring and small socket from a blinker in new car
when i have to wire a charge light and its an led i run a secondary globe in parallel
behind the dash to make it excite better
anyway i doubt thats yr problem
i just realised your alternaotr is so old school its got dinosour dna on it heheheheh
i think your alternator needs an external voltage reg does it run one??
this is a warning to anyone who reads this
ive wired afew customer bought alternators
they r fancy and chrome looking
but they are a pain to wire up as they dont come with ext regs
the shops selling them know fk all about alternators
when u buy a new chrome alternator make sure its internal reg
this means u have supply wire and light wire
old alternaotrs with r and f means u need external reg
here is a pic
Alternator Conversion - TriFive.com, 1955 Chevy 1956 chevy 1957 Chevy Forum , Talk about your 55 chevy 56 chevy 57 chevy - Belair , 210, 150 sedans , Nomads and Trucks, Research, Free Tech Advice
i went thru the summit racing catalogue awhile ago and found 4 or 5 types of alternators for old fords and holdens
some need an external reg and some dont
get the ones with internal reg as it gets rid of alot of wiring
if u need any more info just ask
or email me thru website tomorrow if i dont reply tonight as im off soon since kids just went to bed to play the ps3 hehehe