Riki. Are you still having BTV problems after 2 attempts at at rebuilding it????

Quote from web site supplied above:
"In the dc generator, the emf generated in the armature windings is converted from ac to dc by means of the commutator."

Not sure if i can help but keep in mind that ANY mechanical generator is a TWO stage generator.
In that the INTITIAL formation of electric current is AC (alternating) current. It is the sole purpose of the commutator to transform the AC into DC current.

Re: "Adjustable 3rd brush grounded"

I'm not real familiar with OD generator. BUT BE ADVISED that ANY generator from ANY application may have been modified over the years to acomodate variations in availability of parts.

Some gens are FIELD ground regulation and some are ARMATUER ground regulations depending upon OEM designs that can vary from MFG'er to Mfg'er.

Therfore, regardless of OEM design then ANY gen from ANY application may have been modified over the years simply due to NEED or parts availability at any given time.

Therfore, u will need to do some indepth study on this issue.

Well ok. Maybe not chevy. But what about some OTHER make or model of car.
BTW, chevy ran the curved windshield up thru about 1962????? The 59 and later chevies became wider than the so called tri five chevies. So very possible 59 thru 62 chevy mite fit 55 56 packard.

I found this by searching on "chevy windshield".

https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=653&forum=10&post_id=5568#forumpost5568

Windshield:
U mite want to do some research to determine if some OTHER make of car from the 55 to 60 time frame windshield will fit.

There was a discussion about this some 10 years ago here at P'Info.

IIRC i measured a 55 Chevy windshield but under the conditions i had to measure it i could not determine if it would fit Packard or not.

Let me put it another way:
Probably find a Chevy or Ford etc windshield alot faster and a lot cheaper than trying to SPECIFY just Packard. Not sure if there is a cross mfg'er fit or not. But maybe worth the research for anyone so inclined at this time.

I have used 1980'ish Dodge 1/2 ton pick up truck wheels on my 56 Executive. About the only difference is the centre offset. Only about 1/8" difference IIRC.

I'l have to agree with Owen Dyneto. If a new master cylinder is available for only a few dollars more then no point to rebuilding.

NOW, any machine shop services are outragous in price over the last 5 years or so.

I don't.