hello,lads.... i have a 1976 first run of the gs750. it has a motad 4 into 1 exhaust which I dont like and sounds like shit....might have a chance of buying an original used 4 into 2 exhaust off a 1981 gs750E...... would this fit my bike ... or is it totally different.....as ye can probably tell im not all,that mechanically minded... so if this is a stupid question. dont be too harsh.....name calling and ridicule i can handle....thanks