I'm replacing a few hoses that look OLD (others look like they've already been replaced) in my '81 FI. This includes...
- the 3 gas vapor hoses in the trunk (8mm or 5/16")
- the gas vapor hose that goes to the bottom of the charcoal canister to the metal hose
- the smaller hose that goes from the top of the canister to the intake manifold
- the bigger hose that goes from the AFM boot to the AAR (only about 2 inches long)

The hose on the bottom of the charcoal canister that attaches to a metal hose that runs to the trunk looks original (ie. has the braided cloth on the outside). Can someone confirm the size and type of this hose? Also all the hoses only have gas vapor so I don't think I need the FI pressure lines. Just regular gas/oil resistant hoses, correct?

And I'll use FI style clamps at all hose connections.

I like silicone hoses for the vacuum hose applications. I have them on the charcoal canister to air plenum and big air hose to AAV, as well as other places. They can be purchased at a relatively reasonable cost at siliconehose.com.

I also like ABA worm-gear clamps which are a good compromise between the clamping force of worm-gear clamps and the do-no-harm nature of FI clamps. You can get them (along with any metric connector you can think of) at belmetric.com.

I think you are correct that the vapor hoses do not have to be high-pressure.

Everything replaced. Found fuel line non FI hose in the various sizes and they seem to fit fine. Used FI clamps which are probably overkill but that's ok.