I've had my 2013 sxt for about 6 months now, wanting to keep it for a daily. I fell in love with the challenger and now I want to get either a 6.1 or 6.4 to build and be a higher performance car. I'm aware the 6.4 is the better engine stock but has anyone personally built a 6.4 and 6.1 then compared? There's a big price difference between buying a 6.1 and 6.4, I'm curious as to what would be the pricing to performance difference between them after they're built. 0Any help would be appreciated!