No, just 904. 10-15% is great for track, terrible for street. Converter Slip = torque multiplication (to the approximate range listed above…too much and it’s just a bad selection). Also, slip = heat of course.
I should of course add that this is for the bracket racing we’re doing here. Soggy converters help with consistency because they really narrow your operating band which leaves less room for error. If you had to drag the engine from 3500-7000 in every gear your times would be all over the place!
All out racing and high HP stuff will favor less slip or lock-up’s to maximize MPH and minimize ET.
Some of the reasons why telling the converter folks what your combo is and what you actually want out of it are so important.
