ok so my car was MIA from the cali streets for awhile. got a engine rebuild and the car runs great. i haven't pushed it to hard yet. i think its been about 2k miles now. but now i am starting 2 notice a delay in the backfire when i shift gears at high rpms when i do push it a lil. ok so now i am also looking for a blot on roll cage for the car. but the hard part is finding one for the vert type. i can find them for the hard top but mine. any sites any1 can recommend?