70xlt 302

[70xlt]

I'm doing total restore on a 70 XLT, 302, auto. My question is the grommet that the vacuum line runs thru the firewall. Does it enter from the engine bay or the inside of the truck? During disassembly the grommet on my truck entered from the inside but just don't seem correct. Does anyone know the answer and/or have a diagram of the grommets/vaccum lines going thru the firewall. I realize this a minimal question but I'm trying to restore correctly.

thanks
LT

[basketcase0302]

"70xlt"]I'm doing total restore on a 70 XLT, 302, auto. My question is the grommet that the vacuum line runs thru the firewall. Does it enter from the engine bay or the inside of the truck? During disassembly the grommet on my truck entered from the inside but just don't seem correct. Does anyone know the answer and/or have a diagram of the grommets/vaccum lines going thru the firewall. I realize this a minimal question but I'm trying to restore correctly.
thanks
LT

You my friend have a rare beast, (99% of our bumps never had a vacuum line entering the cab that I'd ever seen). Is the vacuum line for the heat / air controls? It almost appears here on the 358 mile 1970 Ford Explorer just above the brake booster?

[70xlt]

thanks for replying basket case. first I'm a senior doing my first retirement truck. I presume they are some type vacuum line, they are 1/8" ID, there are two of them, one runs along side of the left hand valve cover and the other turns 90 degree and runs to other side of carb. They connect to a black box mounted to the inside firewall at the gas pedal with a two prong electrical plug on it. thanks for any help. There is another plug along side this that the wires run to the coil, heat sensor and oil sensor.

[basketcase0302]

Retired 35+ year HVAC tech-congrats on your retirement. I'm honestly at a loss on what the vacuum line does unless the truck has an overdrive transmission or an Onan generator under the hood. Maybe Jamie / Robert / Randy / Greg or someone else can chime in here and help?
Is this the area the vacuum line enters the cab, (just to the left of the relay mounted on the firewall in this pic)?

[m9452p]

I think the black box was an emission control for the distributor vacumm. I've only seen one like what you describe. Not sure about the rubber grommet, if I can find the photo I'll post it.

[70xlt]

thanks for your help. I presume they are vacuum of some sort. one runs along valve cover to distributors and the other runs to back of of carb on right side and I think attaches to carb or ? I can't remember without looking at pics. the site says my file is to big to upload a pic. the inner lines runs thru firewall to black 3" box at gas pedal. I resolved the grommet issue. thanks again.