Vacuum block screw size

[cecil bass]

Does anyone know what size the screws that are on the top of the vacuum block? I need longer ones! Thanks

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[earlbrown]

I just hung a set of calipers on my vac block bolt and it looks to be 5mm X whatever length you need.

 

[cecil bass]

I just hung a set of calipers on my vac block bolt and it looks to be 5mm X whatever length you need.

Thanks earl

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[earlbrown]

Cecil, just in case you run into this again, there's a trick to keep in mind. Our engines have both metric and SAE fasteners.

All you have to do is look at what they thread IN to. If it goes into a turbo regal specific part, it's metric. If it threads into an old plain jane buick part from the 70's, it's SAE.

It can get confusing as some parts have both threads in the same area like the intake, crank pulley, and headers.