Quad shocks...no won't make a difference. If your rear end is shifting around that much front to back...you need new bushings.
main shocks...yes...will make a difference.
I recommend hooking up with some local stang owners and taking a ride in their car to see the gear ratios and decide how you like it. For me, I feel like i shift way too much with 3.73's and it leaves me no useable gear on the highway cruising without using 5th. I like to cruise in 4th gear at times. Not possible with a stock 3.35 1st gear T-5 and 3.73's. My drag racing days are over. One of these days, i'll change to 3.27's or 3.55's
main shocks...yes...will make a difference.
I recommend hooking up with some local stang owners and taking a ride in their car to see the gear ratios and decide how you like it. For me, I feel like i shift way too much with 3.73's and it leaves me no useable gear on the highway cruising without using 5th. I like to cruise in 4th gear at times. Not possible with a stock 3.35 1st gear T-5 and 3.73's. My drag racing days are over. One of these days, i'll change to 3.27's or 3.55's