701M is late 60's twin cam block, engine could be from anything, highly unlikely to be originated from a Cortina.
701m block is 198mm tall, same as 1500 precrossflow
711 x-flow 208mm for 77.6 stroke
not all the 701m blocks are as good as people think, many found their way back onto the cooking line . . . . there's nothing to suggest ( looking at the photo's) thats not one that passed inspection.
head could be from an Europa, rear pulley was used for the dynamo on those ?
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