Correct Alternator for '68 Dart GTS

Plain and simple .... You have the wrong alternator brackets for a cast iron water pump.

This kit is for 70 and later Aluminum water pump
MRE - Alternator Mounting Kit

This is the kit you need
MRE - Alternator Mounting Kit



Note the triangular bracket is flat.

The spacers are numbered as in the photo i posted in post #2





The adjuster bar goes into the lower of the 3 bolts that hold the bracket to the water pump. Like you show in post #1



Something to note.....

Some of those bolts if too long can crack the front cylinder wall, and use Thread Sealer on them, at least 2 go into the water passage