The plenum on the sheetmetal/EFI base manifold shown above doesn't seem to have too deep of a plenum, so are you saying that is pushing the limit of useable hood space, and will you be able to make a manifold that has adequate plenum volume for the 4200. Do you have any height and width dimensions to observe that you know of to accomodate most possible applications. Obviously trucks shouldn't be a problem, but low hood lined cars can be where the most problems will occur, I would think.
