AC and non AC mounts different and I think that changes the spacers size

this is A/C



this is non A/C




So you can see the diff location of the bracket... in front or rear of the front mountning ear of alternator.

On both setups the spacers are acomodated by the rear alt ear bushing.

BUT the big spacer.... I guess is a bit shorter on A/C cars to accept the bracket location on rear of the front ear