Ty --
That is such a difficult question to respond to "in writing" -- because the question you're asking is visual... some changes might look great while what seems to be a simple (hood scoop?) change might suck.
The only way you really know before the build is to have one of the guys do a rendering - post that up and see what people think.
I was trying to figure out why you asked the question in the first place - so had to assume that you're toying with body mods on your project... so that's why I said maybe to have a rendering done with what you're thinking.
I agree with an above post - when Motion got hold of something - they went for UGLY in the first degree... I don't care how 'rare' they are... sometimes 'rare' is rare because nobody wanted them then either!
