As promised, here we go!
The motor looks like it has about 30 minutes of run-time on it since it was balanced & blueprinted. Check out the distributor rotor...it's the original Autolite and it barely looks used. The cap is Autolite as well, it looks brand new. Consistent with all of the stories from those who knew the engine, I do believe that every part of this motor is original and nothing has been changed. The electrode porcelain on the spark plugs is still white (original Autolites - AF32s). Check out the date codes on the plug wires...I'll be re-using them, and almost everything else on here. The belts, well, it's time to retire them
A few "funny" things first.
The belts all have strange numbers;
-Smog pump belt: Autolite D0ZE-8620-G - 1970 Boss 302
-Alternator belt: Autolite C5DE-8620-C1 - 1970 200ci 6 cylinder
-Power steering belt: Autolite C7TE-8620-A1 - 1967 truck of sorts
More observations:
-D1ZF-9510-YA carb is date coded "063" - this is the earliest I have ever seen
-There are two emissions stickers slapped on the valve cover - one is concealed. Visible sticker part number is D1OE-9C485-DA; I'll try to peel the sticker back to get a look at the covered one.
-Power steering idler pulley stamped D0AE-8A017B - typical 429 suffix is "B2"
-Distributor part number is D0OF-12127-AD - as noted previously, this part number does not exist
-Heads date coded "SPEC"
-The smog pump pulley is from a Boss 302 - D0ZE-9C480-A
-Date code on the exhaust manifold (D1ZE-9431-CA1) is 4-28-70
-The pistons are D0OE-6111-J on the left bank and D0OE-6110-J on the right bank - I've heard of the 6111-J pistons, but 6110-J doesn't exist. All pistons are directionally marked pointing to the front, but one is stamped "FoMoCo", versus "Ford" on all of the others. Strange, indeed.
On the assembly:
-Whoa, man! Check out the colors on the block assembly! The stripes and dabs on the pushrods are neat, as are the many splotches on the heads. The valvesprings are bright-blue striped
-The motor was blueprinted for sure, consistent with the Holman-Moody story. Check the numbered rocker arms and jam nuts.
-There are still chalk markings in the lifter valley
-The crosshatch on the cylinder walls is still perfect
-The heads are CC'd so perfectly - I couldn't catch this in images, but the combustion chamber shapes vary the slightest bit where work was done
-The valve bowls have been cleaned up ever so slightly
There are so many ink, chalk and paint marks on this motor, it's going to take a long time to inventory them all.
My thoughts on this motor? Given the originality, parts-bin special assembly and extremely early date codes, I'm getting a vibe that this is a prototype motor for the 1971 Mustang. If anyone has any info that goes for or against this, please come forward.
Here's a chunk of the broadcast sheet that was found under the hood latch. It seems the car was assembled with the sheet in place...once done, they simply ripped it off! It shows the car's DSO, which is 89.