Black_Magic
Safety Car
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If you're contumplating or need to upgrade you alternator this may help 
George
With the addition of A/C I needed more amps to run blower, radio, lights at night and cooling fans.
I upgraded from original 37 amps to 100 amps which has proven to do the job. Battery gauge rarely moves up or down.
1st of all if you are thinking of upgrading I suggest you read
1 or 3 wire discussion. I did and went with the 3 wire as 1 wire didn’t fit the bill.
1 or 3 wire article
I used plug & play items
NOTE This was for a 1965 327/365 check for other years/engine
Alternator from Powermaster Alternators
PowerMaster 17294 100 Amp 12SI series (Chrome)
Wiring from Lectric Limited
VAK6368SI - ALTERNATOR CONVERSION HARNESS, simple plug-in conversion allows use of a 1969-85 SI series internally regulated alternator in place of the original external regulatator and alternator
VAK6365 1965 ALTERNATOR RELOCATION HARNESS - use when alternator is moved from original passenger side
location to driver side. Can be used with all Alternator Conversion Harnesses (above)
George
Alternator Upgrade
With the addition of A/C I needed more amps to run blower, radio, lights at night and cooling fans.
I upgraded from original 37 amps to 100 amps which has proven to do the job. Battery gauge rarely moves up or down.
1st of all if you are thinking of upgrading I suggest you read
1 or 3 wire discussion. I did and went with the 3 wire as 1 wire didn’t fit the bill.
1 or 3 wire article
I used plug & play items
NOTE This was for a 1965 327/365 check for other years/engine
Alternator from Powermaster Alternators
PowerMaster 17294 100 Amp 12SI series (Chrome)
Wiring from Lectric Limited
VAK6368SI - ALTERNATOR CONVERSION HARNESS, simple plug-in conversion allows use of a 1969-85 SI series internally regulated alternator in place of the original external regulatator and alternator
VAK6365 1965 ALTERNATOR RELOCATION HARNESS - use when alternator is moved from original passenger side
location to driver side. Can be used with all Alternator Conversion Harnesses (above)
Black_Magic: 
this is one of the best upgrades you can do. I did the same upgrade after installing A/C. Prior to the upgrade (with the A/C on at idle) it discharged heavily. I even installed an electronic voltage regulator and saw no improvement. After the 12SI upgrade (with A/C on high, auxillary fans on & headlights on high beam) there is NO discharge at idle. I went with the Delco 94 amp 12SI alternator at Advance Auto Parts ($125.00 with a lifetime warranty)
Roy
this is one of the best upgrades you can do. I did the same upgrade after installing A/C. Prior to the upgrade (with the A/C on at idle) it discharged heavily. I even installed an electronic voltage regulator and saw no improvement. After the 12SI upgrade (with A/C on high, auxillary fans on & headlights on high beam) there is NO discharge at idle. I went with the Delco 94 amp 12SI alternator at Advance Auto Parts ($125.00 with a lifetime warranty)Roy
Sky65
Le Mans Master
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I'm running a 100 amp Powermaster on the 65.
Don't forget to upgrade the charging wire.
http://www.powermastermotorsports.com/charge_wires.html
Don't forget to upgrade the charging wire.
http://www.powermastermotorsports.com/charge_wires.html
I have an original AC convertible and since I will soon be adding a chromed master brake cylinder and booster; the alterantor looks like it could use an upgrade as well. 
