Quote:
Originally Posted by 767Jockey
Careful if you tear it down - if it truly has a NASCAR crank and rods, obtaining rod bearings can be very problematic. They're as rare as hens teeth. The real NASCAR rod journals and rod big ends are a different size than standard FE sizes. Don't damage or discard anything to do with the rod bearings until you're certain that it is or isn't a true NASCAR crank and rods.
And yes, that is a service block. That's a good thing, they're almost always drilled for hydraulic lifters.
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You can re-notch the rods and use standard width bearings which are available
Looks like a single plane tunnel port with two choked carbs.