Thread: 406 C3AE-V Cross bolt???

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Normally .001-.002 of material is removed when the block is align bored. Offhand i can't remember the exact measurement of the mainsaddle bores. Both 406's i had used a grooved crank on the mains and were C2 and C3 castings. But it's hard to tell if that's the original crank. It may or may not be. You might be able to tell from the timing set as align boring brings the cranks centerline a little closer to the cam. In some cases a shorter timing chain is used. You can inspect the main area and see if it's looks like it's been machined. Original blocks would have a patina on the main face area. Best thing is maybe bring the block to a good shop and have them measured. I'm sure they can tell. It's hard to say otherwise without seeing the block in person. Either way it's a really nice block to have. What heads are on it?

G.

Thanks for the help FFR! The block came without any heads on it. They were used on the new engine put in the car so I never saw them. Upon close inspection at the crossbolt areas on the side of the block they all have that little recess around the bolts like the factory cast them. I really think this thing is an original crossbolt engine unless, someone went to the pains of replicating those recesses. This thing must be one of Fords factory mistakes, or actually bonuses! I do want to check the core though to see what it is. I guess I shouldn't be looking a gift horse in the mouth since I got the block for free but, its nice to find out what I have. Yeah, I got it for free from someone who was going to throw it out as scrap. I guess even a blind squirrel finds a nut every once in a while Thanks again for all the help!!