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This list of alternators will help you determine what alternators will interchange with each other on GM, Ford, and Chrysler vehicles. This should help you find the best alternator to use when upgrading to a higher amperage alternator. The alternators contained in each row will have the exact same mounting configuration. We can provide wiring harness adapters, a 1-wire regulator, or instructions if wiring changes are necessary.
GM (with straight ear mounts - 6.6" between ears)
GM (with straight ear mounts - 7.2" between ears)
GM (with dual spool ear mount)
Ford (with straight ear mounting - 6.93" between ears)
Ford (with straight ear mounting - 8" between ears)
1G Large Case
Up to 225A
3G Large Case
Up to 250A
Ford 3G (V mounting style)
Ford 3G (T mounting style)
Ford 6G (V mounting style)
Ford 6G (T mounting style)
Chrysler - Early
Roundback Squareback
Up to 75A
MegaAmp
Up to 320A
Chrysler - Late