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Re: 1977 Chevy G20 [Re: jtozier406] #761081
May 19th 2020 12:12 am
May 19th 2020 12:12 am
Joined: May 2020
Posts: 33
Bozeman, MT
J
jtozier406 Offline OP
newbie
jtozier406  Offline OP
newbie
J
Joined: May 2020
Posts: 33
Bozeman, MT
I can snag a hightop for cheap and I am currently debating installing this on the van. First of all will this fit on my 77'?

Do you think this would devalue the van? It's fiberglass and in good shape minus the seals and some minor holes. We will be building out the inside for camping and possibly multi month trips. Basically I don't want to wire the inside up without the top and then feel like we need to add it later.

Attached Files
2_20200518_161245.jpg (96 downloads)
1_20200518_160448.jpg (98 downloads)
0_20200518_160802.jpg (98 downloads)

1977 Chevy G20 with 350
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Re: 1977 Chevy G20 [Re: jtozier406] #761086
May 19th 2020 9:33 am
May 19th 2020 9:33 am
Joined: Jan 2012
Posts: 50
FOLEY, AL
G
glenna Offline
journeyman
glenna  Offline
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G
Joined: Jan 2012
Posts: 50
FOLEY, AL
I don't know if it will fit. But I believe you will really appreciate the headroom if you are doing a camper conversion.

Re: 1977 Chevy G20 [Re: jtozier406] #761090
May 19th 2020 10:36 am
May 19th 2020 10:36 am
Joined: Jan 2014
Posts: 1,022
Staunton, VA
kursed Offline
old hand
kursed  Offline
old hand
Joined: Jan 2014
Posts: 1,022
Staunton, VA
For the exhaust smell, make sure all your exhaust gaskets are new, and make sure they are all tight. There should be gaskets between the manifolds and the heads, there should also be gaskets between the manifolds and the downpipes. Also check that all of your other connections between exhaust pipe (where one piece of pipe connects to other pieces of pipe) are tight and not deformed. Obviously a good weld will give you the best seal in those areas, but even the clamps should seal well if done correctly. Old mufflers with holes in them will also allow the fumes to escape easier giving you the bad smell. Just some areas to check.

As for the hightop, I prefer your van without it, but ultimately it's your van and you have to love what you do to it, not us. As for "value" of the van, I see more value for "unmolested" vans personally. The vans that haven't been cut a bunch seem to hold more value, unless you are a fabrication wizard and do a wild custom van with all sorts of stuff, which would be a different story altogether, but generally speaking when I come across vans for sale that have been cut up and altered by regular vanners like most of us here, they don't tend to sell as quick and easy as those that have maintained most of the stock body. Just my 2 cents.


[Linked Image]
Re: 1977 Chevy G20 [Re: jtozier406] #761156
May 20th 2020 10:02 am
May 20th 2020 10:02 am
Joined: May 2020
Posts: 33
Bozeman, MT
J
jtozier406 Offline OP
newbie
jtozier406  Offline OP
newbie
J
Joined: May 2020
Posts: 33
Bozeman, MT
I will get moving on the exhaust leak. I found a video on line where someone attached a shop vac to the tailpipe. They put it in blower mode and were able to pinpoint all the locations with some soapy water.

I picked up a charcoal canister and mount at the salvage yard. However I have an Edelbrock carb and I am not sure where to plug in the hose that says 'Carb' on the canister.

As for the hightop I am back and forth on this. I agree the original look is optimal but the function of the hightop would really allow for more comfort while traveling. So first of all will any G20 hightop fit? I am also thinking of picking it up, refinishing and setting it on top to see what we think before we cut the roof.

Attached Files
Last edited by jtozier406; May 20th 2020 10:03 am.

1977 Chevy G20 with 350
Re: 1977 Chevy G20 [Re: jtozier406] #761219
May 21st 2020 9:35 am
May 21st 2020 9:35 am
Joined: Jan 2014
Posts: 1,022
Staunton, VA
kursed Offline
old hand
kursed  Offline
old hand
Joined: Jan 2014
Posts: 1,022
Staunton, VA
As long as the high top comes off the same model van and same wheelbase, should work just fine. Swamp Wizards on Instagram did one not long ago and they used something like two or three high top sections to make one, cut and keyed them to fit together, was quite an undertaking but he made it work.

Not sure on the Edelbrock and charcoal canister, might be some info on that on the hot rodder forums all over the net. I usually deal with Holley and I've always removed the charcoal canisters as opposed to putting them back on.


[Linked Image]
Re: 1977 Chevy G20 [Re: jtozier406] #761261
May 22nd 2020 2:25 pm
May 22nd 2020 2:25 pm
Joined: Jul 2011
Posts: 13
cincinnati OH
7
77RALLYstx400 Offline
stranger
77RALLYstx400  Offline
stranger
7
Joined: Jul 2011
Posts: 13
cincinnati OH
Oh man, I will definitely be following this! 77 G20 owner here.


1977 GMC Rally STX G20 Bought new by parents
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Re: 1977 Chevy G20 [Re: kursed] #761265
May 22nd 2020 3:13 pm
May 22nd 2020 3:13 pm
Joined: May 2020
Posts: 33
Bozeman, MT
J
jtozier406 Offline OP
newbie
jtozier406  Offline OP
newbie
J
Joined: May 2020
Posts: 33
Bozeman, MT
Originally Posted by kursed
As long as the high top comes off the same model van and same wheelbase, should work just fine. Swamp Wizards on Instagram did one not long ago and they used something like two or three high top sections to make one, cut and keyed them to fit together, was quite an undertaking but he made it work.

Not sure on the Edelbrock and charcoal canister, might be some info on that on the hot rodder forums all over the net. I usually deal with Holley and I've always removed the charcoal canisters as opposed to putting them back on.



When removing the Canister did you just plug the Fuel vent line? Mine is just sitting there open at the moment.


1977 Chevy G20 with 350
Re: 1977 Chevy G20 [Re: jtozier406] #761271
May 23rd 2020 12:37 am
May 23rd 2020 12:37 am
Joined: Jan 2014
Posts: 1,022
Staunton, VA
kursed Offline
old hand
kursed  Offline
old hand
Joined: Jan 2014
Posts: 1,022
Staunton, VA
Originally Posted by jtozier406
When removing the Canister did you just plug the Fuel vent line? Mine is just sitting there open at the moment.


When I've removed them in the past, I've just plugged in a remote rollover style vent like this. Mounted in place of the charcoal canister. If you want to retain a charcoal canister, you should be able to use one from a C10 or K10 Chevy truck of similar years as well. I can't say for certain, but I believe they used the same ones.

Remote Rollover Vent Valve @ Summit Racing

[Linked Image]

You don't want to just plug it off as it still needs to vent the vapors from the tank somehow. Also think about position if you've relocated it, don't want the vapor in the cabin or near spark source.

Last edited by kursed; May 23rd 2020 12:38 am.

[Linked Image]
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