Re: rear end ratio
That's right, the SRT6 rear gears will improve on our 1st gear shift to 2nd. I think it's a 3.07:1 definitely be able to stay in 1st longer, and get a higher top speed before redline cuts you off.
If you could actually find a 4.11 and install it, which I doubt it would fit but 1st gear will really be useless then.