71/4 How Strong Really

I have a 7 1/4 SG 3.91 in my 66 Valiant, that turns mid 13's. Had that same rear in my 13,sec Cuda that weighes 3200 lbs, and my 65 Valiant, before that. Also have a 5.13 SG 7 1/4 on the "rack, and the parts to build a 4.56SG 7 1/4. The early Clutch type SG are much stronger then the later cone type, or an open rear. The clutch SG's have 4 spider gears, where the other units only have two spiders. I would not use a 7 1/4 with a stick, but a SG one with no "slop" and a 904 should be OK.

PS: my cars 60 foot about 1.79-1.80 and my 170 nitrous motor makes 358 foot lbs 2950 rpm at the rear wheels