Plus, a forward sump, and I don't recognize the xmsn either.
It's not a "Healey" Austin engine; I wonder what it was really intended for?
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57 Healey BN6L-942 Wine Red
61 McCulloch R1 Yellow
99 BMW M Rdstr Cosmos Black (formerly supercharged)
01 BMW M Rdstr Steel Gray
08 BMW 535xi Monaco Blue Metalic