its hard to choose a converter without all the engine and drivetrain components, such as compression, cam specs, carb cfm, and rear gear. with specs given i would check the TCI breakaway line. here is a link with a chart for a few other street converters. read a few and it will give a better idea of what might suit you best.

http://www.jegs.com/webapp/wcs/store...47572_-1_10555