351 swap headers...are they really needed, i am wanting to go to longtubes with my 351 swap, i was told that i cant use the regular 5.0 longtubes cause the 351 is a little higher and the headers wont go down as far, so i was wondering if i could use regular longtubes for a 5.0 on the 351 if i put in drop mounts, oh and i want to use fox headers so that egr bung isnt there, if i cant then i will just buy the hooker 95 cobra r shorties that summit sells, thanks