i am installing an autometer boost gauge and i have got this far.....cut the vacum line behind the intake and "T" the boost line in it.....then run line back into the car...is this all?

 

you've answered your own question NKOTB....

 

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now run it to the gauge input and thn wire the gauge to power and ground.

 

where is the vacumm line at behind the intake?

 

bump for which vaccum to splice into...

 

So, is everyone retarded?

You hook up one end of the hose to a vac source and then the other to the gauge...all vac sources are created equal (except for half of the brake booster hose, since it has a check valve).