My '68 RR with a glass 6 pack hood raised up 1-1/2" every pass for years with no ill effects to the hood, some were I have a video of it, see if I can find it. My Challenger hood raises up about a inch as well it has a big pro stock type scoop and I drilled 4 - 1-1/4" holes in the back which had no effect so I just let it do it's thing as well as doesn't seem to hurt it either.