not hard to do, just not worth it unless you go with an open air cleaner that seals to the hood. i did that on one of my 69 340 swingers years ago. modded a fiberglass 6pak air cleaner base to take a 4bl and raise it about 2" to seal to the hood. worked great, but cutting a 69 dart power bulge hood with a jigsaw while it's still on the car, isn't for the faint of heart :rolleyes: if the early rust doesn't scare you, your happy with the price, and you really like it, go for it