Blueprint crate engine

If it's stone original, it MIGHT still have a tag on one of the center section bolts with the ratio on it. I wouldn't bank on it. Other than that, you'll have to determine if it's open (99.9% probability) or sure grip.
Both rear tires off the ground, neutral, if sure grip, turn one tire, the other will go the same direction. Open, the other tire will turn opposite, or not at all.
Further instructions and methods for counting the gear ratio are available on you tube. Good luck.



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