preparing for gage...hole sizes?

[rameye]

Seeing as I have the entire truck apart..or so it seems. I thought I'd prepare my manifolds to recieve gages. I figure it's alot easier with both the turbo and intake off the engine.

Question...what size should I drill and tap in order to recieve gages. I will put in a plug until the dollars once again become available.

Thanks as always..

[Barry Nave]

1/8 pipe

[rameye]

Got it..

1/8 NPT

thanks

[tom.mcinerney]

1/8 npt is nice for intake/boost.

If mounting Isspro to exhaust man per JK for exhaust pyrometer, it's more like 1/4 npt.