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6,307 Posts
About the bigger booster:
If you have an 87-93, you can put in the bigger booster by just elongating a mounting hole. If you have a pre-87, you have to **BASH** and CRUNCH the back of the strut tower to get it to barely fit.
For my 86:
bigger pic:
http://www.veryuseful.com/mustang/brakes/graphics/bumpForPowerBooster2.jpg
If you have an 87-93, you can put in the bigger booster by just elongating a mounting hole. If you have a pre-87, you have to **BASH** and CRUNCH the back of the strut tower to get it to barely fit.
For my 86:

bigger pic:
http://www.veryuseful.com/mustang/brakes/graphics/bumpForPowerBooster2.jpg