Mustang 5.0's had forged pistons up until 92. I have heard of some late model 92 production 5.0's having hyper pistons. It is safe to run boost/juice on hypers, just be safe and take the precautions regardless of the type of pistons.
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TFS heads/FTI custom cam/TFS street heat, Longtubes, 373's, MM lca's, Tokico springs/shocks
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