That would depend on the motor. My Mazda's block is mfg by Ford (the balance shafts and other various engine parts say FoMoCo on them), and I'd have no issue throwing a modern DOHC Coyote block into something if it didn't need mountains of power.
The reason I'm going this route is because of parts availability, and the fact that the block is 2000+ horsepower capable.
Small step back in technology, huge leap forward in potential output.
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