Hi, i have a 1964 chevy C-10 P/U , and ever since i put a new 292 straight six in it i noticed the exhaust manifold was leaking, thinking it was a broken seal, i took off the manifold to find it was warped and cracked, and i have had a hard time finding a used one, whick would be preferred, so if you have any information,I would appreciate it a lot, thank you my Email adress is halfthree@aol.com PS if you know of any cheap new ones, that would be great,thanks