[breedb]

No new parts are being sold with this engine. The only thing that has been done to it is the crank machining (-.010). The cam, intake, and distributor are not original.
Basically, I think a 428 CJ is the same no matter what type car it originated. I'm told one of the main differences is that the heads are superior to your every day 428 truck engine. However, this engine belongs in what it originated which was a 68 Shelby GT500KR. This is tribal knowlede among my family. The guy who installed a new stock replacement 428 in his Shelby probably didn't keep the dual carburetor set up because his new engine didn't have the flow capacity or compression to handle it.
A discussion on how much HP a stock 428 CJ produces could soon dominate my thread so I don't want to go there. Let's just say there's plenty of HP and Torque to get the job done.
Don't know how many miles were on the engine before disassembly. Probably a million or so - however, everything has been inspected and is in good condition. Once you put it all together it will be just like new as long as you know what you're doing and install new bearings, rings, hone the cylinders (don't need machined for sure), and all the other normal stuff you do prior to assembly.
As far as the "blue printing", I don't know what they did at the Ford Factory. There's no bushing in the stock timing gear so I doubt it was ever "blue printed." It's internally balanced (no external counter weight). Someone later installed an Eddlebrock aluminum intake and Mallory distributor but that's it. Not even a new cam or timing gears/chain.
It's easy to prove this is a 68 CJ but I don't think it's that easy to prove it's a Shelby CJ. I think the Casting Codes merely indicate it could be from a Shelby GT500KR. There's no VIN on the block or at least I can't see it. I believe Ford didn't start stamping VIN's until sometime during 1968 so this one must have went through the assembly line before they started. There's a “20F” stamped on a flat spot under the head on the block but have no idea what it means. One guy told me it's an assembly date from when the car went through the line (20 June).