I Had 323's in my car----so/so.... I put 410's in it and loved it. I am sure it is good for maybe 2 tenths or more or better. I put the 323's back in and wasn't happy. I don't have to go over 3k on an interstate or cruisin.
I just had my dana 60 done, it has 354's in it. I am wondering if maybe I should step back up to 410's? I used to run 11.98 with my 355's many years ago in my street car and a 440 with an automatic, but I had a 4500 turboaction stall and it took care of slow out the hole. I have a 4spd now, and 28" tall tires.
Just trying to get the low down before I install the rear. I may be doing a gear change