How to find new alternator?

[catch2otwo]

So my 68 gmc originally had a 327. The previous owner swapped in a 350. I need to buy a new alternator. How do I make sure I get the correct alternator at the parts store without bringing my alternator and putting it on the counter since this is my only vehicle.

[Shyguy]

I usually go to O'Rielly's website and check the parts for both engines. When you look up a part they have a compatibility tab that can be selected and it will tell what engines a part will fit.

[68gmsee]

A pic of your alternator and engine setup would help (front and back). Here's a good article on id'ing them.
http://www.madelectrical.com/electri...elcoremy.shtml

[cdowns]

if only vehicle ?? how about driving it to autoparts store??

then if there is a question have them walk on out an have a look

[volksworld]

I agree...charge the battery fully and drive there...its 2 bolts,change it in the parking lot .at least then when you get the defective one you can try another...or put in a regulator when it still doesn't charge....most parts houses cant look up the right one even when you're holding it

[WorkinLonghorn]

Get the regulator too.