Topic: 1980 20r getting rid of emissions

[Yotaoverland]

I live in Texas and happened to get my hands on a California truck. I don't want or need all of the emissions stuff on the truck. I'm wondering what vacuum
lines are essential to the running of my truck and what can go? I took the charcoal canister, and all of the EGR stuff off. Got rid of most of the vacuum lines and hard lines that ran along the valve cover. I assume I just need to keep the vacuum lines for the distributor and block off the old vacuum ports? I plan on getting a Weber carb, should I keep or change out the stock distributor?
here are some photos of how it currently sits.

[H8PVMNT]

I'm sure someone else will chime in.  The easiest way would be to use a weber but it looks like you're doing OK to me.  I would keep using the stock distributor, no reason to change that.  EGR and air pump block offs, plug your unused ports and you should be good to go.  There are a bunch of good write ups on de-smogging the 22r carb.  Here is one: 

http://www.yotatech.com/f114/22r-desmog-tutorial-264405/

 20r carb is pretty similar, maybe even a few less things to mess with.

[Yotaoverland [OP]]

I'm sure someone else will chime in.  The easiest way would be to use a weber but it looks like you're doing OK to me.  I would keep using the stock distributor, no reason to change that.  EGR and air pump block offs, plug your unused ports and you should be good to go.  There are a bunch of good write ups on de-smogging the 22r carb.  Here is one: 

http://www.yotatech.com/f114/22r-desmog-tutorial-264405/

 20r carb is pretty similar, maybe even a few less things to mess with.

Oh, awesome. Thanks for the info!

After getting it all wired up again, I can't seem to get it started. So I thought maybe I was missing an important vacuum line.

[H8PVMNT]

I could never get that GM igniter mod to work on my 20r.

[Yotaoverland [OP]]

I could never get that GM igniter mod to work on my 20r.

Is that what mine has? The previous owner pretty much hacked the whole truck. I had to re-wire the entire thing. I've found ghetto-rigged "fixes" all over the truck. So I'm not sure what's stock and not.

[209toyota1]

Run a weber and you'll have the 2 vac lines to the distributor and 1 to the break booster and that's it. I have some nice pics of some desmogged 20Rs if you want some. I also have a nice diagram for the GM igniter if anyone needs one they work sweet.

[Yotaoverland [OP]]

Run a weber and you'll have the 2 vac lines to the distributor and 1 to the break booster and that's it. I have some nice pics of some desmogged 20Rs if you want some. I also have a nice diagram for the GM igniter if anyone needs one they work sweet.

I'd love to see some photos. So do I have a GM igniter?

[H8PVMNT]

Yes thats the little black thing on your driver's fender.  There's a lot of good tech on it if you search. Toyota owner mag did an article on it too.

[79coyotefrg]

best thing to do is get rid of that anemic 20R carb.   and the very restrictive 20R exhaust.  a weber and a header will light that 20R up like a street demon.   later on we can talk about a cam to liven it up even more. 

distributor?  I guess the dual diaphragm distributor on a 20R is a california thing but if you can find the non cali 20R distributor with the single vac line it does help.