Has anyone used the flowmaster 3" american thunder kit, i know mustang 50 mag did a tech install on it, i was just wondering if anyone has this kit and if they liked it, also what shorty headers to use, do you have to have 3" collectors b/c of the full 3" exhaust?, building a 347 stroker and soon to be turbo'd or s/c after the breaking so goign to need a nice exhaust system, any help would be appreciated, thanks