You could order a Nova, a Chevelle or an Impala with a six, about three or four different V8 engines (in many different stages of tune), various transmissions and almost any final drive ratio you wanted?

There must have been a reason why that rear end was not available as an option in '91. I can only guess that performance/reliability up and down hills (much less MOUNTAINS) will suffer. If you live where it is good (?) and flat you may see no real ill effects except a certain loss of UMMMMPHHH! at takeoff?

Shouldn't hurt your gas mileage...

Cheers!

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'91 420 SEL @ 199K, '92 SVX @ 181K, '93 SC400 @ 86K, '93 Kaw ZX-11 @ 30K, '87 F250 @ 181K , 2001 Valkyrie Interstate @ 6K, Y2K Honda NightHawk 250 with 1.5K, '88 420SEL I.@ 179K & the 2nd latest, an '88 420SEL II.@ 210K runnin' parts car, '85 F150 300/NP435