Your blue project build was a nice truck. Looks like it took a big hit Was that a Skyline front bar on it? If you want to go US style you can use Sigma doors. I remember seeing one on sigma-galant.com when I was an active member. You can get the 2.6 hauling well enough without messing with the truck too much. A decent duration cam and a Weber carb will be a good start (you've already got extractors with some thermal wrap so I wouldn't be surprised if it's had some port work). I've seen bike carbs on the 2.6 and it sounds mean and goes hard.