Besides an actual diesel converter, what mods are needed for the 47RE to handle 650 ft lbs pulling 11k lbs?

May be closer to 550 to 600 ft lbs.

Thanks!!


72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.