hi all new here but i need some help i recently bought a 86 savage 650 for a 100 bucks. it dosent have any compression . now ive not got a chance to pull the head yet but from what i no is the guy i got it from ran it for about 6 mounths with the muffler removed and no jetting done .so im assuming its goinging to need a new top end..how hard is this to do?and were would be the best place to get the parts..thanks for any help can wait to get her runnin.