1) what's the best sounding exhaust for a 305? right now i just have aftermarket muffler on and it really sounds like a 350 no joke, but i want the free breathing full exhaust system that sounds equally as good

2)dont know if this is an exhuast problem or not, but my car makes realllllly wierd noises sometimes when i floor it, it's like a raspy, metal to metal sound...i can hear it in the exhaust, so that's why i thought i'd put it in here...didn't know for sure if just the muffler going out, or if it's the tranny or what...sometimes it's louder than the actual exhaust note when i floor it so i really wanna get that fixed lol