I had a 4800 stall TCI that was behind my 365, X headed non stroker and it went 11.18 @118.5 in my 3200# dart at the time,,so yeah, that converter is hurting you,,also I switched from a low first gear 904 to a std first gear and actually picked up some 60ft time and helped down track.

Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.