I'm replacing an alternator on a Jeep.  The alternator has 37 as the last
two digits on the number stamped on the body.  To me that means 37 amps max
output.  This jeep is set up for plowing snow with a blade and tends to
drain the battery while plowing as the amount of plowing done means the jeep
doesn't run that long.  Most replacement alternators lately list two
amperages, one for idle amps and one for highway amps ... If I select a
rebuilt that claims 36/63 combination, is that most likely a similarly rated
alt. as what is on the jeep now?  Or would that be a higher output
alternator?  Otherwise the original alt. would called a 21/37 today??

Thanks