I would recommend you not use the TCI converter. First off for normal street use it will just boil the ATF, you need a lot more ATF cooler than with other brands of converters, TCIs run hot. And for race use they aren't predictable enough. In a Ext Cab application you really need to think hard before installing a converter that stalls higher than 3000-RPM, I would not recommend going above that. Remember that after a certain point in stall speed the truck will get slower 1/4-m times because of the lost efficiency in the upper rpms.

Mr. P.