I have a 850dp that I would like to convert from 2 idle to 4 idle circuit,can it be done and what would I need to do.Can't give a part # it's been milled off!Thanks Jim graemlins/waving.gif

I'm having my carb done right now. It involves drilling a few holes and plugging some others. Drop Tom Vaught a line (BOOSTENGINEER@aol.com). He used to work for Holley and does carb stuff on the side.

Regards,
Gary Anderson

Vizard has a carb book that details this mod. Drill some holes, plug some passages, add a second primary metering block, or drill 'n' tap the secondary block you've got.