Well after last weekends UCP ride the one thing I noticed is the K5 needs more low range. Here is the current set up: 350 tbi (stock) th400/241 SYE with Highangle 1350 CV shaft 1 tons with Detroit in back with 4:10's 37" MTR's I put the 241 in for extra low range but it needs more. I don't want to step up in gears since this will cruise 70mph all day long with the th400. I built this for Donna but I feel extra low range will help her more then using the skinny pedal harder. Also it needs to be simple for her and that is why I'm thinking the Atlas might be a better choise over the Doubler but I do have a 400/203 and a 400/205 so I have the hard parts for the Doubler. Cost is somewhat of an issue but either way I need to keep it at $2500 or less for the total swap. Stephen, what's your input on this?