good news I located Short Block 455 Olds for my 72 Cutlass currently I have a 350 olds in it what will I need from my 350 to make 455 work ??

 

Water pump, fuel pump, accessory brackets and pulleys, flexplate, and motor mounts. (Do not buy "455" motor mounts, use the 350 mounts). Of course you will need BBO heads, intake, and exhaust manifolds to complete your short block.

 

You will need 455 heads, intake, push rods and Cutlass 455 exhaust manifolds. Everything else from the 350 Olds will work. When you say short block, I assume you are getting the oil pan with it. The small block oil pan will fit, but I have heard that there is a problem, I have never put one on, but it may be worth a try. Be sure to use the rubber motor mounts for the small block Olds.

Gene

 

what size and type of headers can I put on her ??

 

Any headers for a 68-72 Cutlass with 455. Some fit better than others. The primary tube diameter and length should be selected to match your intended use.