4.10's or 4.30's for 8 3/4 gear swap

dont know but they was noise on the drive side with what little street time i drove it. I set up the 4.30 gears my self and after 15 passes they are still doing fine. but saying that they could blow up the next time i take it to the track.also i am building a 73 duster and was wondering how you got your car down to 2800 pounds? have any pics of your car you could post? thanks Mopar65
there is a basic picture under my screen name will add more when i take some the car has no interior sheet metal dash fender wells are cut out trunk lid backing is cut out fiberglass hood and bumpers lexan front and rear glass trunk and rear fenderwells are cut out and tubbed and replaced with sheet metal the guy who i got the car from said it was 2800 with the 383 in it im going to weight it when i get it all back together has no alternator or power steering etc.