When I go big block I'll buy the biggest kit for the 543 and do it external oiling mod... And by that time I should be able to understand nitrous very well and give it a good 400 shot or maybe even a couple stages by then.. Yee haa..
And of course I wouldn't be worried about room under the hood I would definitely cut the inner fender Wells out and wanted sticking up through the hood anyways with dual quads on it!...