When I did my 3G upgrade (PA Perf), I needed to trim the threaded bolt hole tab to fit the mounting bracket from my S-Trim kit. Not sure if you have a S/C or not but wanted to give my $.02 on that issue. Good luck
One other thing, be sure to upgrade the wire from the alt to the starter relay, a 4awg wire with a 200 amp fuse is what PA gives you (optionally).
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1990 7-UP Mustang S-Trim,Edelbrock,GT-40, Isky roller cam,Tremec,Torsen diff 31 splines,4 wheel disc and a whole bunch more...
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