ls1curt

iTrader: (31)

where do the vacume lines behind the intake go to? below is a pic of what i have. the engine in going in, in a couple hours so i need to know which lines go where.
thanks

ILLWS6

iTrader: (13)

Ok I think the two above the bellhousing there go together somehow. Thats the best i can tell by feeling around back there. The other is the vacuum feed for the hvac. It tee's into some lines that go through the firewall on the passenger side.

ILLWS6

iTrader: (13)

Here ya go.
https://ls1tech.com/forums/generatio...schematic.html

ls1curt

iTrader: (31)

so something like this

ILLWS6

iTrader: (13)

Ok man i'm really trying here but it hard to see. we can figure this out.
The FAT port on the back goes to the brake booster for sure. I dont know if that piece turns, i dont have a FAST intake, but mine points toward the drivers side. The line with the straight end on it goes to the nipple opposite the fat one like you have the arrow to.

ILLWS6

iTrader: (13)

Now the small fitting on the manifold itself does not exist on my LS6 intake. I can't help you there. I think its just an extra vacuum port.
That last line goes here:

bene

iTrader: (16)

Okay the one on the right is for your A/C vacuum line, connects to the small port on the right and the one on the left is for your AIR system. IIRC, there is a T fitting that connects to the A/C vacuum line.