crites restoration has the solution to fitting a 351w in a mav without any tower cutting needed. if you get these headers you will find gaskets at jegs to fit the larger port on the headers run copper it is the way to go. i already had my towers notched but i seriously believe them when they say that no cutting is needed to install these. the pipes are installed seperately four front pipes go under front axle and back four drop down where headers usually drop and they all bolt up to the collectors at the end.
it will be a bit im not the best at taking pics and loading them onto sites. if you get texts i could always just send a pic that way otherwise it will take a little bit. but just so you know i notched the towers half assed and need to go back measure everything out and clean up my cuts cause they dont look the best. but will definetly get pics