[1turbofocus]

A 4000 stall is very tall for the Focus unless you going to about 8500 rpm , stall converters also create a lot of excessive heat

The TQ converter will help but I dont think thats enough to hold that much more TQ with the trans being stock , you need the better clutches if I remember right Lentech added an extra clutch to the clutch packs uses

Chris at Lentech would be the best guy to ask about that

Tom