298 durration?????? w/ 527 lift????? my cam is over .700 lift and is only around 270ish on the durration.. think you might have the wrong specs...
anywho....

converter will be too loose for the street, might work for a strip/street car, but with that stall you'll need to be making some power to use it..

I'd look for one that would better fit your combo. Give a local speed shop a call or one of the converter manufacturers..