I ran 4.56 in my duster and best et was 6.455 in the 1/8, switched to 4.10 and it's gone 6.461. Pretty much same mph 103-105. 60' used to be 1.39-1.41 usually goes 1.42-1.44 now.
I think Matt did the same thing in his duster. 4.56 to a 4.10 and I was kinda pissed because I thought it would really slow it down but it didn’t. His car when running is a moving billboard for me and has gotten me a lot of porting jobs.