According to the tranny/gear/rpm calculator I have, with the W58 and stock tires, these are the top end speeds of different rear ends:
4.30 (F-283)
130.6 mph @ 6000 rpm
152.3 mpy @ 7000 rpm
4.10 (F-293)
137.0 mph @ 6000 rpm
159.8 mph @ 7000 rpm
3.73 (F-303)
150.7 mph @ 6000 rpm
175.8 mph @ 7000 rpm
3.42 (F-383)
164.3 mph @ 6000 rpm
191.7 mph @ 7000 rpm
If anyone is interested in this program, email me and I'll send it along - it's got the specs for most Toyota tranny's and diff's, and you can enter custom tire sizes.