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1989 Chevrolet S10 Tbi Assembly

10. The new TBI assembly fits just like the factory piece, even though it features larger throttle bores. Holley uses a tapered base gasket to transition down to the smaller holes in the manifold. When it's time for upgrades, all I have to do is machine the manifold for the larger holes, and even more air will get into the motor, but that will be later.
1989 Chevrolet S-10 Tune-Up - Maintenance With a Shot of Whoop Ass

 10. The new TBI assembly fits just like the factory piece, even though it features larger throttle bores. Holley uses a tapered base gasket to transition down to the smaller holes in the manifold. When it's time for upgrades, all I have to do is machine the manifold for the larger holes, and even more air will get into the motor, but that will be later.  View Related Article

 

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