Without a doubt, a 1967 12 CC series! Thin wall but had the cross-drilled EN40B
nitrided crank, Cooper S rods, pre-smog head, and the highest HP of the 1275s.
A Mini Cooper head from the same year might be marginally better if you compare
stock...
Kent
1960 Bugeye
1975 Midget - some day auto-x-er
1973 TR-6
---- uniquelittlecars@yahoo.com wrote:
> Group,
>
> What was the years that the changes were made to the 1275cc motors?
>
> Like the thin block, big bore, best head, smog head crank and other
>componets. I am trying to figure out what year is the best motor made as far
>as thickness, heads and other componets. If you are wondering why i am asking
>these questions.
>
> TIA,
>
> Vigil
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