Topic: What do I have under the hood? c5ae-6015-e

[don.piotrek]

Working on a full overhaul of my engine. According to the car vin, this is a Dec '67 C-code from Dearborn.

I ordered brand new valves for a c-code and... they do not fit. Seems like a k-code valves would fit.
The engine casting number is C5AE-6015-E, with 4M1 above.

Does this mean the block is not original to the car? Is it a 1965 c-code/ k-code?

[67gtasanjose]

In +50 years, anything can happen.

Perhaps best if you provide casting information off of the heads instead of the block.

[ChrisV289]

4M1 would mean December 1st of 64. 

[J_Speegle]

Does this mean the block is not original to the car?

No

Is it a 1965 c-code/ k-code?

Don't know - since all you have offered is the casting number from the block and K codes didn't use a different number than  non-K codes.

Look for a VIN stamped on the block, open it up and identify the parts, Main caps, rods, pistons, cam, lifter.... of course some of the original parts that would help identify would be replaced or gone if its been rebuilt

You don't offer offer a picture of the head - guess you have not identified them as K code original ones. These may just be non-performance heads that some one had built with screw in studs and bigger valves. Chevy valves were popular for some builders. to squeeze a slightly larger valve into a small space

[markb0729]

You said your Mustang is a 67.  The date code of 4M1 on the engine block is 12/1/64 as ChrisV289 states.  That engine would most likely have been in a 65 not a 67.  So I'd say no the engine is not original to the car.  You'll have to do as Jeff said to verify if it's really a HiPo engine.

By the way, you need to find out what heads are on that engine before you order valves.  Could be a set of 302 heads for all you know.  Also, there could be variations in 289 heads depending on the engine change level.

[jwc66k]

Does this mean the block is not original to the car? Is it a 1965 c-code/ k-code?

The engine is not original to the car.
As to it being a high performance engine, consider this: the 289 engine block was commonly used by all Ford and Mercury product lines in 1965. Several million 289 blocks were cast. Less than 8,000 became used as HP blocks. ALL HP blocks were supposed to be VIN stamped. The Metuchen assembly plant supposedly did not stamp all the blocks with a VIN. I am more inclined to believe that many of factory original HP engines became "un-serviceable" due to owner miscalculations and their broken blocks may have been replace with non-VIN marked blocks. That's based on some observations I made. I was there in 1965, on the East Coast, with my own 64 Fairlane 289HP problems.
Jim