Anyone with any experience with these guys? I inquired with them and got this info back: Hello and thanks for inquiring, I recommend a custom configured converter from our "Street Edge" series with stall math set between 3400-3600 rpm, and STR set at, or near 2.50. This converter uses the 245mm (9.5") impeller and turbine (furnace brazed). The 9.5" impeller is the most efficient impeller ever adapted into performance applications. With 8 impellers and 8 stators to select from this converter can be truly custom configured with no cutting or bending inside the converter. This means better launches are a guarantee, better mid range response is guaranteed and no excess heat or loss of topend, guaranteed! All the gains while retaining 100% of the manners needed for every day street use! All wear surfaces are fitted for enclosed Torrington bearings for less drag and improved longevity in performance application. The drive hub and spline insert of made of 4130 chrome moly steel. Anti balloon measure is standard. Warranted for a full year with our 100% money back satisfaction guarantee. The "Street Edge" TH350/400 sells for 450.00 plus shipping Please let me know if you have other questions, or call us at 888 350 EDGE The info I sent them: MAKE AND MODEL INFORMATION Make : Chevy Model : Camaro Z-28 Year : 1980 Rear end ratio : 3.73 Tire size : 28 inches Weight : approx. 3700 lbs. Displacement : 355 Power Adders : Other Horsepower : 390 Torque : 380-400 Numbers based on : Desktop program Camshaft maker : general kinetics Duration : 230 Lift : .500 Centerline : 108 Motor plate thickness : n/a Transmission type : th-350 Shiftpoint RPM : 6200 Low gear : stock i believe Trans brake : no Converter : don't know Stall speed : 3000 Diameter : 11" Desired Stall : 3200-3500 Racing Type : street/streep Street Use : rarely Just curious on thoughts/opinions about these guys. Thanks.