Gentlemen! I have a 5.0 (1991) Mustang with stock pistons. According to Technical Reference & Performance Handbook, the piston deck clearance on this stock motor is .0135 above deck. Which head gasket should be used with aluminum heads, such as Windsor Jr, Edelbrock Perf. etc. The Fel-Pro 1011-2 is for alu heads, but the compressed thickness is .039, makin the piston to head clearance an issue. How have you done it? Should I buy the expensive special gaskets, or what? Thanks.