[Caprimaniac]

What I have found is that when going rich on the idle, the plugs get fouled and engine will stumble at least in the transition.

If it runs fine with the 65's with no troubles (engine fires at all cylinders, always..) I'd keep it. Although 10.5 AF sounds a bit high....

Some have said that you should run a 00 exhaust for "performance use". I have found a good AF reading & nicely running engine by using smaller idle jets and 00 exhaust. You might get identical results by using another pump rod as well. (I've no IDA technical expertise...)

Hope it runs well, soon- summer's arriving....