Do I need bigger jets now?
 

I have a bone stock (including rats nest) '85 12A except for the header and straight pipe to one muffler. Do I need to install bigger jets in the carb to comphensate for the exhaust flow? The car pulls to about 7500 rpms now (from 6500). I feel a small decline in power after 6800 rpms. Will the jets cure this or do I need to go deeper?

Stock jets are fine.