Mocked up the chassis/body/interior with the engine. So far, so good it seems. I did have to use the stock '72 manifolds, as none of the headers I had would fit the chassis. The trim is done, but I still need to do a little detail painting here and there. I sanded off the 442 badges on the quarters and decklid- they were really faintly engraved. I think I have some 442 decals laying around (Lindberg '67 kit, maybe?) so I can always add them later if I think the car looks naked without them. I DID leave that weird 'vinyl top' trim the kit seems to have, because I liked how it looked.
Could not get the bumpers to fit much better than this, but I used to have a '66 Cutlass, and I don't recall the bumpers exactly hugging the body on that one, either. Need to touch up the chrome plating on them in spots, too.
You might have noticed I kind of glossed over the interior- it is basically the Chevelle tub, with about four Olds parts grafted in. I also used the Chevelle seats and steering wheel. Interior is the least important part of a Pro Street car anyway, it's all about the tires and the powerplant, right?