I haven't done it yet, but I haven't read or heard of one bad thing happen when bumping the timing. This has been done for years with the 5.0's.
The only problem I can think of when bumping the timing would be if you didn't use the appropriate octane of gas for a long period of time.
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-Aaron
"Lita"
97 Mustang GT Vert
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k&n, air silencer removed, Magnapack cat-back, BBK o/r h-pipe, Ford red front calipers
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