Has anyone checked fit of the "original" PI Big Throat Headers and muffler assemblies using M-6049-C3L Ford MotorSport Yates Aluminium Heads? The exhaust Ports on these heads are raised about 1" from their stock (cast iron Cleveland)head position, which would extend the headers out horizontally about .70" and up vertically about .70". I'm building a motor based on these heads and am wondering if the headers need to be altered so the header flanges clear the rear springs. Maybe just shorten the collector?, or has somebody made Custom headers to mate with the original Big Throat Muffler/Pipe assemblies. I know it is real tight in the outlet flange / half shaft area with the headers and pipes as is, with the stock PI Big Throat Set, even with the half shafts flipped.
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