i searched and found that tilton makes clutch discs for their 7.25in multiplate clutches with a 29mm 21 spline hub which is what fits the w58 and r154. also quartermaster will make the flywheel for the 7m for $270ish. used tilton tripple plate clutches got for less then $150 shipped on ebay and new are ~$500. however yous want the cermatalic discs to try to street the clutch, though id recomend organic or kevlar if possible. i havent checked other mfg's for the discs. just thought id throw this info out there. makes for a cheap high hp capable clutch though will require an internal slave setup which isnt too much. depends what brand you go with.