Yeah what's a shortened crank? Never heard of that before? Yes, 7AFE's are mainly eco engines. Unless you put $$$$ into it then you will get some gains (which you already have). but not as much as modifying a 4AGE. How much boost are you going to be putting out? What about an aftermarket ECU if you haven't already though about it? If your looking into coilovers, have a look at MRP coilovers. Apparently there really good compared to BC and those other Thailand branded ones. Handling and steering changes a lot, but the ride though becomes more uncomfortable compared to your normal spring and shock combo, but I guess I'm use to it haha You may want to look for smaller wheels as well. 15-16" are perfect for these cars. But its up to you, its your car whatever makes you happy :) I personally think 18-19 inches are too big in my opinion.