I would think the stock 66 jets that come in that holley would be close, I wouldn't think you would need to go down 4 jet sizes, but what elevation are you at?
the ignition box stock or orange is a pos for what you are doing
[over 5800rpm], I mean to say that there are better units out there
[chome box/MSD]and why mess around.
unless you have acceleration/off the line issues, leave the shooter alone.
like T said though you would normally see a 35+ or so nozzle with 3000 stall.