Mine is a stock housing and 3.54 gears with a Dr Diff spool in a 3,700 lbs. car.

It's been 1.36 60 ft. and sees a lot of street miles. Footbrake, though.

'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.