i have a 454 1972 chevorlet engine withought and alternator. i am trying to find the correct amount of amperage that i would need for the new alternator. thanks for the help

i have a 454 1972 chevorlet engine withought and alternator. i am trying to find the correct amount of amperage that i would need for the new alternator. thanks for the help


this should work with a 78amp ....with the carb engines of that time this size was widely used....

with fuel injection higher amps are required in the 105-120amp range...

Use the one that came with your car. Unless you added a big stereo or other goodies.

A quick check at the auto parts store says that the original is 63amp. If your planning on running HEI or performance ignition a larger alt would'nt hurt. A larger alt may drag some HP form you but you'll probably not notice. As metioned earlier, if you plan to have a great sound system w/amps and subs ect, bigger would be better.