4L60E converter
 

Custom built converter from NAN converter in Belford NJ. Has some local street miles and 1/4 mile passes.
Found my car was over powering and pushing through at higher RPM. 5500+
Converter flashes around 3800-4000 with good street manners. Changed to more of performance converter with higher stall. Asking $200.
Probably work great with bolt on cars.