Hello! has anybody ever done a restoration on a t bird? doing a # matching car? I am kind of new at this and I am trying to collect now parts for the resto. My question today is about  an exhaust valve or heat riser. Can any body tell me about the casting numbers for this part? I have one and the seller claims it is an nos part, but I cant find any numbers on the part! not that i doubt the seller but I dont want to install the part and then have to take it out again because the seller and myself were wrong! I am begining to find out that just buying now parts is risky. Thanks Guys