What kind of improvement will I notice,as far as SOTP and 60' times? I don't want to go any steeper than 3.73's, as this is my daily driver and I do drive around a lot,but I also like to go to the track on the weekends and add to my light to light list. Is the cost worth it?

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'91 RS, 375hp 350
New paint-solid black
ROH Snyper wheels-17x9 wrapped in 275/40/17
ASCD SS hood, High-rise Z-28 spoiler,shaved handles/antenna,
Hooker super comp 1 3/4" headers,dual 3" exhaust,two 1-chamber Flomasters,machined hi-perf GM heads,Holley double pumper 650 w/50cc pumps,Power Plus 360* high rise aluminum intake,Edelbrock Elite valve covers/14x4" open air cleaner,Mallory AFPR,Proform HI-perf HEI disributer with curve kit,Crane 292 cam,2500 stall converter,Eibach Sportline springs,KYB struts/shocks,completely rebuilt steering linkage,36/24mm sway bars,12.7 steering box,wonderbar,145 gauge cluster,Auto meter gauges,dual guage A-pillar pods,180* thermostat,dual push/pull cooling fans.
75-125 shot NOS system planned.

President-Austin 3rd Gen F-body c.c. - message board at
www.hpsmotorsports.net
See my car and others at www.ride4life.net

 

You'll probably be better off the line, but I think your mileage will suffer some. The cheapest way is to find a L4 engined f-body in the bone yard (I believe many of them came with 3.73's because the L4 barely made enough power to get out of it's own way) and get 90-92 axles with the SLP posi.

My 3.42 is going to cost me about $275 when all is said and done with a near complete rebuild and the above mods... that's axle bearings and seals and all new brake components... my main cap bearings and pinion bearing were practically new in this core I got. For me, it's worth the cost because i have anemic 2.73's in it now.

As far as 60 foot times... they might improve a little, but more than gearing, traction is your biggest issue there.

 

I just recently went from 3.23 to 3.73 and i noticed a huge difference off the line and on the highway. It jumps up to speed up on ramps. Gas mileage i noticed i fill up maybe a day sooner. usely every 4 days. Don't know the numbers trip meter broke. But as for traction it hooks up good but when tranny is cold it sctraches 2nd pretty good.
But with brand new Traction T/A's and a new Eaton posi it should launch hard.
As for numbers ive never run it at the track and when spring comes i want to.
Bone stock on Gtech I ran 0-60 6.9sec. didn't feel like getting a ticket for quarter.
Haven't g teched it since gears or other mods.