Re: Idle quality
A higher stall converter would be a requirement with an auto and that cam. Yes it may assist in idle quality, normal stock converters lock up @ about 1200rpm I think. It's not an on/off rpm set up though. It's a gradual build up to be fully "engaged" by that rpm.......but like you mentioned, higher stall = more slip down low.
The power range in the cam is 3000-6000rpm. If your stock converter locks up at 1200rpm, you'll have a dead range/flat spot (where the cam produces crap power) until you baby it up to ~3000rpm. That's why a 2500+ converter is recommended, to bridge this gap. When you nail it, your rpm will rise rapidly and start hooking up around your stall speed, similar to dumping the clutch on a manual = instant power range.
393 Tremec TKO 9"