WOULD THIS 100 amp alternator work

I don't know which alternator your 70 Swinger uses but the alternator only puts out what the system requires. For instance, if the battery is fully charged and all accessories are off but the engine is running and the ignition is drawing 10 amps the alternator will put out 10 amps. (as a general rule). Although, do yourself a favor and if your battery is discharged, don't just jump it and rely on the alternator to recharge it. Your alternator will charge at full output and fry your amp gauge then nothing works until you replace it or temporarily by-pass it. I did that on my 66 Dart and it only has a 46 amp alternator. toolmanmike