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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
The BBK and Mac Strut TowerBrace basically bolt in the same location ...firewall and strut tower.
I'm not positive about what size bolt dia. you'll need because I it was over 8 yrs ago that I installed that STB, but it seem like it was 5/16" by 3/4" in those locations.
You'll need to drill all the holes ....2 into the firewall and 2 into the the strut tower.
ditto..put the bar on center it...mark the holes, drill the holes and install the bolts...my cowl panel had to come off to get the nuts behind the firewall...took 30 minutes total