Oops, I will try to down load the photo again

That is exactly how the early MK1 S body numbers were stamped. The M2/06 was at right angle to the body number. Later cars had the M2/06 all over the place.


The car would be around YKG2S2 1070 - 1080. Only the 4 numbers will be stamped into the firewall.

Many thanks for that, you have finally solved my puzzle. the engine lines up loosely with the same time in mid April "66, 9FSaY 393358. I will try to find the stamped number on the body however there was a lot of surface rust in that area due to a large rats nest and parked in a damp shed. thank you again for your help, I am excited.!!

Looks like you have an extra digit in the engine number.

To confirm the stamping is original there are a few things to look at.

The engines up to 9FSaY 40000 had a small "a" and had 3 "backslashes".



Engines after 9FSAY 40000 had a large "A" and 2 "backslashes".



I haven't been able to confirm the exact change but it was somewhere around 40000 and 40250.

Perhaps simply typo with wendy's keying, or the last character is an S (meaning sleeved) and not 8?

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

I had grand children hanging off me when I put the engine number in , it is actually 9FSaY 39358.
I am working on the firewall, which is very rusty, however I believe it to be 1077 or 1037. I am guessing that the number 3 may be a horizontal line on the top not rounded. if rounded it will be 1077.The numbers are very faint and a bit of imagination is needed due to rust!! I will try for a Photo

The number 3 stamped into the firewall had a flat top. I would expect your car to more likely be YKG2S2 1077 going by the body number. I have attached a photo of the stamping for a firewall chassis number with a 3 and 7 to compare with.




The radiator shroud body number had a rounded 3 like below.

Try wetting the area and very gently rubbing with steel wool and soap

_________________
"Show me the Mini!"

The numbers are faint however I ran a black texta over them to highlight them for the photo

I found the Chassis number for 1078 and the 7 has a small drop down at the top left.



Do you think that yours was New British Racing Green with a Toga White roof like car 1078?

Looking at Wendy's pics it looks like car number 1077.
Don't blame the rats and the damp entirely.
The car number was stamped after the body was painted and the paint was not retouched so the punched numbers rusted.
My first S was car 1090, engine number 39922 and the same colours as car 1078 shown above. The "NEW" British Racing Green paint colour always puzzled me.
It was purchased in July 1966 from Goulds Motors in High St Northcote.
Engine numbers don't appear to be matched in sequence to body numbers on the production line as the engine numbers were stamped into the ID plate after the plate was stamped and presumably fixed to the firewall.

Perhaps the upper case A started at engine number 40006 as there were changes to the camshaft and, IIRC, the crankshaft at that engine number.
Camshaft was changed from AEG148 to AEG510 and, IIRC, the crankshaft oilways were cross drilled.
Lucas 23D4 distributor advance curve and service number were changed from 40819 B to 40819 H to match the AEG510 cam.
PS:
Also in my previous reply I forgot to mention there was no cross angle bracing bar in the grille opening. It was vertical the same as non S cars.

RonR

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68 build Mk1 Cooper S
72 Clubman GT project. Total restoration required

I don't know why I didn't think of that earlier. It makes perfect sense. Thanks

It's only a possible explanation/guess. Nothing to prove one way or the other.

RonR

_________________
68 build Mk1 Cooper S
72 Clubman GT project. Total restoration required

Just a few photos of the other things to check over.

Your car wont have the tabs on the drivers side to hold the breather hose. They came in at around car 2300. Your car should have 2 holes in the same spot.


They fitted metal clips into these holes at approx car 1000 - 1100.


The electric fuel pump has a vent piped into the cabin. A plastic rivet can be seen under the rear seat - passenger side.


The heater J brackets are another thing to check. They are spotwelded in 3 spots each.


As mentioned before the early MK1 S had a vertical support brace for the slam panel. The oil cooler was a 9 row and it was bolted up to the engine. The change to 13 row oil cooler and an angled brace was car 1344.

I attached three more photos, my car does not appear to have had a centre bracket behind the grille however there is the remains of a spot welded bracket in front of the oil filter. It did not have an oil cooler present when I bought the car.