Hey everyone I'm am currently build a mini and I want to build a 1275 turbo. I'm finding it hard to find a 1275 block. I have had a couple of guys offer me 1100s blocks or morris 1300 block just wondering if these are the same or am I better hanging out for a 1275 block? And if they are the same do the have the same internals
Thanks cam

Morris 1100S and 1300 are both basically the same 1275cc block.
BL just chose to call them by stupid names for confusion.
They are stronger than a Cooper S block but a bit heavier. Can also be bored out a bit further than an S.

Early 1100S motors up to ~12YD/Ta/H 10500 have a small journal crank and Cooper S rods.
Later ones and the 1300 have a big journal crank and rods.

I run a 1300 auto block with a Cooper S crank in it so there is interchangeability.

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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.