n2o

iTrader: (1)

How much lighter do they make things. I know that it is rotating mass which less is better. I am about to buy a 9in and I was most likely going to opt for these. Also what gear is just down from a 3.50? I have 3.42s now and don't wan't to go higher if I can help it.

2MuchRiceMakesMeSick

Im not sure of the exact weight but any weight you can shave off of your rotating mass is good.
I opted for the gun drilled option on my 9".

n2o

iTrader: (1)

Where is a good place to purchase them as well?

2MuchRiceMakesMeSick

http://www.billingsleyracing.biz/

n2o

iTrader: (1)

Is 3.50 the highest I can go??

n2o

iTrader: (1)

Also are there any issues known with driving gun drilled axles on the street?

86irocz

Any axle manufacture will tell you that gun drilled axles are not for street driven cars.

JeffT

iTrader: (22)

you will save about 4.4 lbs. per axle by having them gun drilled and star flanged. this is for a standard length f-body axle from Moser.

CTSmechanic

iTrader: (2)

There are 3.45's avalible for a 9 inch... I wouldnt waste money on gun drilled stuuf for a street car.....that money could be applyed elsewhere with better results

1badA3Z

iTrader: (58)

cts is right,put the money in an aluminum center section and good parts,and gun drilled axles arent recomended for the street,put the money else where,jmo

EPP

iTrader: (22)

Moser at first only offered the aluminum center section, and they have never had one that they know of break. I agree with everyone above, don't go for the gun drilled axles on the street, unless it's basically a track only car. Go for the aluminum center section instead. With aluminum center section, price including shipping is $2,500.00. Bob

badpewter-z

iTrader: (4)

gun drilled, aluminum center and its not much heavier if at all than the stock rear .

CTSmechanic

iTrader: (2)

If its a stret car I wouldnt run a Alum. center section the weight isnt worth the reduced life of ring and pinion...Also it wouldnt be a bad ideaif you do choose a alum center section to have the set up re checked once theres some miles on it alum will move around enough to warrant a double check