I have a zz502 and it came with a holley 850 vacuum secondary carb.  I yanked it off and installed a speed demon 850 mechanical secondary carb.  Right now it is jetted 80 primary/88 secondary.  I think the primaries may be ok but when I open the secondaries I think it is getting too much fuel.  Any ideas what jetting might work best for this application?  Street driven..no racing... well,not on the track anyway 

 Thanks