I bought a 1275cc engine that came out of a mortis mini 1300 auto and am going to do a rebuild, but the rebuild kits on Minisport there are 2 the 1275 not A+ and the copper s 1275. Is mine an Non A+?

Engine prefix 12H169H, 12YAAH and 12YEAH are A series Automatic engines (not A+).

The casting number at the back of the block is probably 12G 1279 which is the standard 1275 A series Non S casting.

So it's not an A+. Ok thanks

That would have been a "dead" mini 1300?

If you plan using the auto block in a manual setup, are you aware that some changes to the block are needed?
There is an detailed explanation on Ausmini:

viewtopic.php?f=25&t=90470

you do need to be a little bit careful - the two different sets they're talking about there aren't really A+ v's A series, it's the size of the crankshaft's conrod journals - A+ used the larger size, however Morris 1300 engines came in both sizes. You need to identify the crankshaft before you order anything.

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did I tell you that I won a trophy?

Well there you go. I did not know that Morris 1300's came out in a small journal. I knew that the Morris 1100S did.

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.

I'm only going by the auto 1275 I have in my garage - it has a small journal crank - I don't know if it came from an 1100S or a 1300

my advice is still to identify the crank before ordering anything

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did I tell you that I won a trophy?

1300 auto blocks were 12YEAH prefix.
I've had a couple, both same, with large journal cranks.
These came out after the 1100S manuals were obsolete (replaced by Morris 1500 ohc).
1100S auto early motors 12A169H were thin flange and had a small journal crank.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

So Morris 1300s didn't come out in both sizes?

I had an original Morris 1300 and it was large journal too.

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.

@TK,
Small journal crank was long gone by the time Morris 1500 manual and 1300 auto cars replaced the 1100S.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Large journal. Now just to get it measured and crack tested and machined and then start to worry about the bearings you need to buy.

I wanted to get it up to 1380cc and I know it will need a new crank with a longer through, new pistons due to the larger bore. Do I still need need to get the right journals?

a standard stroke with oversize pistons can get you to 1380. Remember to offset bore the block.
Why do you need a new crank?

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.