I think the bright orange sounds good, it'll be a little different from the usaul red, black, blue colors (not that I have a problem with those colors, some of my favorite colors!LOL), maybe have some yellow stripes, the black wheels sound like they would go good with the orange. As for the RG engines, I have a few of them & have had only minor fit problems, nothing that a little sanding won't take care of, the worst thing I've had was on the 815" P/M Ford engine I bought, a little prob with the upper oil pan fitting flush against the engine block, just sanded down the sides on the block till it fit better, haven't had any probs with the RoadHammer Hemi or the 815" Next Gen Semi-Hemi that I got.