I have an 86 k5 with a 305. My quadrajet is fubar'ed where the fuel line connects. The fitting is actually jb welded in place . Anyways, I got another qjet. However, on the "new" one, the throttle plate is froze up and the piece that holds the roll pin for the accelorater pump lever is broken. What im wondering is if i can use the bottom and top pieces from my old carb and the center section of the "new carb" and make one good carb. I guess what I would do is to use needle and seat and stuff from my carb. Any thoughts on this?