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[Beau_Jester]

A word of caution on your crank pulley. Don't get anything larger than a 5" diameter drive pulley. Anything larger will overdrive your power steering pump and cause the pressure valve to blow apart and spew all of your power steering fluid. The fluid also gets very hot and will overflow out of your reservoir. This warning is from experience. I also blew out my stock NA head gaskets at 9psi with 10:1 pistons. I had to install TT 3 layer steel gaskets.

I am presently having ASP Racing (dot) com make me a six rib drive pulley and matching SC pulley to achieve a little over a 1:2 ratio. (ASP is the secret company many pulley makers use for "their" custom pulleys). MY SC is rated at 10000rpm, but an occasional trip to 120000rpm won't kill it. I will attain at least 8-10psi boost (you don't really know until you run it). I already had them make me a six rib power steering pulley. You can use my drawings (in their files) to model your pulleys. $150 drive pulley, $100 SC pulley, $100 power steering pulley. I had the six rib power steering pulley pressed on when I rebuilt the PS pump. Six ribs is better than four on the SC for grip. I am running the alternator and AC compressor with a four rib belt without any problem.

I made a huge mistake replacing my 10:1 pistons with 8:1. I lost a lot of power. 10:1 is perfect for up to 10psi, which is effectively the design limit of the Eaton M90. I am now going to do a TT conversion to get that HP back and then some... I will be having a perfected supercharger kit available after the conversion. The rebuilt M90 has less than 500 miles on it.