A pre facelift 230k would be an easier option less sophisticated ECU so much more configurable. You won't manage 240bhp with the ASP pulley alone been there and done that one the best you can get with a pulley swap is about 231 bhp and then you have to upgrade the intercooler. My 230k has Brabus K1 tuning which consists upgraded pulley larger intercooler etc see
HERE with a few other tasty mods you can just squeeze above 230 bhp, I then went into a performance head and bigger valves etc and now running around 270 ish bhp
Good luck with the conversion will be nice when done
