depends on the engine, on the 351, it is on the left side head deck/rear side. On the 302 it's near where the alternator is mounted, if you have the shop manuals, it will tell you on the first page for your particular engine.
Most Early Mustang engines (pre 1968) do not have the VIN number stamped into the block.. The exception being "K Code" 289 High Output equiped vehicles where engines were stamped with the vehicle number.
Additional info to above answer: Ford V-8 engine BLOCK casting numbers of all 1960 - later Ford V8s are located on a flat casting area nearest & under the starter. (Yes, you must remove the starter to see the whole number, bring a small brush and carbcleaner spray). If you practice upside down mirror reading and Yoga, then you don't need to climb under the car.
The casting numbers will be a 4digit - 4digit - 1digit format.
This gives block designation info as to Decade, year, car models, and part number and exclusive designation. Eg:
1965 289-2V or a 289HiPo will both share the same casting number for 65-66 C5AE-6015-E, except that the HiPo will additionally have the car VIN stamped nearest the oilpan gasket/rearward as a HiPo exception to prove Mustang powerplant bloodlines. Nobody forgot to stamp a VIN at the factory.
No other Mustangs had VINs stamped into engines.
Some people mistake the intake casting number on top of the intake manifold as the engine casting number, but alas, it's the intake casting number to give that part authenticity too. Check with a reliable source for part ID. I have disassembled many 64-73 Mustangs in California with a variety of 1yr Block/different yr head/intake/exhaust combos with claims of hypo-yada yada or secret Ford engine with common vin numbers. Many, many, older motors (of every brand) were assembled in the last 45 years with various off-year parts to try to achieve a special performance blend....some were successful.
Under the valve cover where the valve springs are.
Actual olds heads casting numbers are underneath the valve covers
Mustangs, as in the feral type, are not found in Australia; that would be a Brumby. Like Mustangs, they are not endangered and their numbers are regulated by the government.
The best way to identify your motor is to use the casting numbers on the drivers side rear of the block, behind the cylender head. The cylender head casting numbers may help too, they are located under the valve cover.
73l
casting numbers are on the back of the block. there are numbers on the pad by the head on passenger side front that will reveal information too
There is casting numbers on the side of the block, just above the freeze plugs, that will give the casting date. give those numbers to year one dot com or some dealers, that fool with classics. they have the chart to convert the casting numbers to dates.
MorTec.com has casting numbers and information
what does the casting number GM 3892657 say about this engine block
There are none , They had a sticker on them
Casting numbers on top of the bellhousing flange and the suffix number on the block deck in front of the passenger side head. The casting numbers will tell you which block casting you have. The suffix will tell you what HP rating it had, what it was likely installed in, and what transmission was mated to it.
The Pontiac V8 head casting numbers are usually found on the exhaust side of the head. I have seen them located just below the valve cover, over the two center exhaust ports, or over the end exhaust ports. Some heads cast the numbers below the spark plug holes between the 2 center and outer exhaust ports.