Correction: I believe the housing number is #1100796. It is difficult to
read- lib

It would appear to me the "61a" is telling you it's 61 amps. I can't
find the #1100796 in my parts book, so can't tell you the application of
that one.

NCRS indicates the '63 base unit should be a 37 amp, #1100628. Looking
up a replacement alternator (GM referred to it as a generator) in my '79
dealer parts book, I see they were calling for the following:

'63-'68 Generator  
#1846935
42 AMP
(EXC. A.C)

With the following notation: "Replaces 37 amp generator"

This rebuilt unit and a brand new 42 amp unit are the only listings
given for a '63 replacement.

To recap, it appears you're using a 61 amp alternator in place of the
original 37 amp unit which was subsequently dropped by Chevrolet with a
42 amp alternator specified as the direct replacement. Long explanation
short - I'd say the 41 or 42 amp replacement you bolt on would do just
fine.

Here's waving to ya - \||||

Owen
___

'67BB & '72BB

-- not affiliated with JLA forum in any way -- alt.autos.corvette is
original posting --
___

"To know the world intimately is the beginning of caring."
    -- Ann Hayman Zwinger

no problem, the current rating is the max the alternator can put out at
rated speed, as long as its for a 12v system you don't have to worry. the
built in regulator and condition of your battery control how much current
flows, you will just have a bit more of reserve current  than before --- in
this case more is better.  Putting in an alternator with a lower rated
current
than the oem will cause problems and lots of blown alternators.

Dr