Well Ive spent hours searching for the twin cylinder A series
someone chopped up so someone pls help me with the link?

Ive been seriously thinking of a super economy engine since
for quite sometime now and would like to do an a12 bored to 76mm
for a 630cc turbo twin cylinder engine.

then I thought of another engine that would be interesting an SD25
diesel with small turbo chopped in halve would make a 1145cc twin
and probably around 80hp with the torque of a 2litre.
However the pump is the issue and would need careful machining to
turn it into a dual unit or maybe a perkins unit could be used?
edit: oiling could be an issue also with pickup at rear section
but the LD20 ohc diesel is better suited for a 1ltr twin.