I am wanting to pick up an extra brand new 5.8L Shelby aluminum engine block to keep with my car, just in case. The Ford Racing P/N was M-6010-M58A but that part was discontinued after a year and is no longer available. However, the actual Ford P/N: DR3Z-6010-A is still available AND I have found this block to be less expensive than the Ford Racing one. Does anyone know if there were any differences at all between these two 5.8L Shelby engine blocks? While I believe it is in fact the same 5.8L block and that Ford Racing just utilizes a different part number than standard Ford does, I am not positive so I thought I'd ask. Thanks for any info you can provide! :rockon: