Crap! Have the car about 3 weeks

70 Duster 340 running a 360 currently. Electric fan and fuel pump.

Looks like I have a bad alternator. Battery discharged at a show, barely made it home after getting a boost. Charged the battery and seemed ok - ammeter does show discharging but centers or moves slightly positive when driving.

So I tried the remove positive lead trick I saw suggested here in another thread. Motor quit running after about 5 seconds.

So, I am guessing it needs replacing. Any input appreciated as to what alt. might work well with my car.

Thanks,

Steve