72 c10 alternator question

[BCOWANWHEELS]

can somebody tell me the ac delco alternater part number. my truck has a/c and a 350 engine. thanks

['68OrangeSunshine]

10 SI? Or did you want the 7 or 8 digit GM number?

[BCOWANWHEELS]

i need to buy one and my local parts places want almost a hundred bucks plus tax. there 45.00 on amazon but i need the correct a/c delco number to get the highest output. i dont want a 1 wire or internally regulater. just a stock hi output direct replacement.
thanks

[BCOWANWHEELS]

found it.....
gm number 19135685
ac delco gold 3342127
63 amp

$59.00 delivered amazon no core required

[FirstOwner69]

Rock Auto shows that as the 2 groove pulley version. They also have the single groove version. Their price on either is only $32.99 including a $6 core charge. Shipping and sales tax is additional.

[Accelo]

As you can see there are a bunch to choose from.
They go from lowest amperage to the highest at the bottom.

[BCOWANWHEELS]

yes i want a 2 groove pulley because my a/c isnt restored yet this way i can have dual wp / alt belts and its 63 amp

[HO455]

Be aware if your truck came with the 37 amp alternator it has a different wiring harness than a truck that came with the 63 amp alternator.
This is not shown on any of the commonly available schematics. The 2 that I have parted the harnesses weren't in the best shape so I've never seen a complete unmolested one. But there are definite differences.

[BigBird05]

HO455 is the difference in the gauge size of the output wire?

[BCOWANWHEELS]

for decades i,ve upgraded the alternators with no problems ever. its not like your drawing max amps constantly

[HO455]

Originally Posted by BigBird05

HO455 is the difference in the gauge size of the output wire?

The most complete one I've seen appeared the have the same size wire but there were 2 of them coming off the alternator. One went to an insulated post (Same style as the one next to the battery) near the horn location. There was a second post a couple of inches from the one with a jumper wire between them and some other wires to the voltage regulator.
The other wire I assume went to the battery like normal but, the harness was seriously hacked and it wasn't worth saving so I trashed it.
I wish I could come across a complete one to see how GM actually wired it. It is possible that GM just added a second harness to a regular 37 amp harness.
I believe the extra posts were provided to allow customers a place to hook their large amperage loads near or at the junction point of the main harness where proper voltage sensing would occur.