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Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #778558 July 02nd 2021 8:54 pm
Joined: Apr 2007
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I have found a couple of C4500 Kodiak/Topkick dashes and really fighting the urge to swap the whole dash. Honestly looking at the structure that mounts to the firewall I am reasonaly certain it is not even the whole dash that has to be swapped. Rather just some of the pieces that bolt to the structure. The dash pad, lower trims, and the cluster bezel along with a coupe of air ducts and the radio craddle. There isna company that makes a really nice wood dash kit almost matches the wood in the van as well.

[Linked Image][Linked Image][Linked Image]


1983 G20 Conversion Van, 350 TPI, Reed Hydraulic Roller cam, Ported 906 Vortec, Edelbrock 3817 TPI-Vortec Base, Doug Thorley Tri-Ys, Dual 2 1/2" exhaust, Speed Density 7730 ECM tuned by ME, 700r4 by ME, Stock 1,600 rpm converter, Rebuilt Stock 10 bolt with posi by ME, 3.08 gears, 358 RWHP @ 5,200, 384 RWTQ @ 3,400, 14.66 @ 95.43 w 2.28s 60'
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Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #778566 July 03rd 2021 2:30 pm
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Wow; pretty cool head unit.

Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #778598 July 05th 2021 12:54 pm
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Switched gears this morning because I got tired of working under and in the dash. Installed my power steering cooler and plumbed the power steering/hydroboost system. Was also given a 31 case size marine optima combination deep cycle starting battery that was supposed to be bad. It charged right up on my computerized charger and fit in the vans stock tray although I need to figure out a hold down.

[Linked Image]

[Linked Image][Linked Image][Linked Image][Linked Image]


1983 G20 Conversion Van, 350 TPI, Reed Hydraulic Roller cam, Ported 906 Vortec, Edelbrock 3817 TPI-Vortec Base, Doug Thorley Tri-Ys, Dual 2 1/2" exhaust, Speed Density 7730 ECM tuned by ME, 700r4 by ME, Stock 1,600 rpm converter, Rebuilt Stock 10 bolt with posi by ME, 3.08 gears, 358 RWHP @ 5,200, 384 RWTQ @ 3,400, 14.66 @ 95.43 w 2.28s 60'
Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #778637 July 06th 2021 9:24 am
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Nice score; especially on the OPTIMA battery. Good product.

Re: 1997 Chevy Express Cobra Conversion
SDMickey #778715 July 08th 2021 9:08 pm
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Originally Posted by SDMickey
Nice score; especially on the OPTIMA battery. Good product.
Thanks!

I spent some more time over at the shop last night. Working on building trans cooler lines.

The Trucool D7B I have been running compared to the factory cooler still laying around the shop. DB7 is roughly 50% larger(wider and taller) and roughly twice as thick. It probably has 3 times the cooler fin surface area the stock one does. Replacing the leaking factory lines and quick connects with AN on it too. My previous converter was a 10" job that stalled 2,700 rpm and the D7B plumbed in after the radiator cooler kept the trans around 160°F max even towing my travel trailer. The condensor has a nice trans fluid stain on it that is filled with dirt and it is absolutely full of small rocks and debris. Good thing it is getting replaced with a new parallel flow.

[Linked Image][Linked Image]

Last edited by 1983G20Van; July 08th 2021 9:18 pm.

1983 G20 Conversion Van, 350 TPI, Reed Hydraulic Roller cam, Ported 906 Vortec, Edelbrock 3817 TPI-Vortec Base, Doug Thorley Tri-Ys, Dual 2 1/2" exhaust, Speed Density 7730 ECM tuned by ME, 700r4 by ME, Stock 1,600 rpm converter, Rebuilt Stock 10 bolt with posi by ME, 3.08 gears, 358 RWHP @ 5,200, 384 RWTQ @ 3,400, 14.66 @ 95.43 w 2.28s 60'
Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #778741 July 09th 2021 1:26 am
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Nice work my friend. You are so lucky to have a shop across the street,

Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #778743 July 09th 2021 9:17 am
Joined: Apr 2004
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Nice work, Do you know much history on the Cobra company?
My van is a cobra too but from '79.

https://www.vanning.com/threads/ubb...e-ultimate-custom-camper.html#Post403571

I wonder is it the same people or did the name just get sold on.


79 chevy G30 cobra camper conversion.
[Linked Image]
Re: 1997 Chevy Express Cobra Conversion
shaggy #778746 July 09th 2021 11:15 am
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Originally Posted by shaggy
Nice work, Do you know much history on the Cobra company?
My van is a cobra too but from '79.

https://www.vanning.com/threads/ubb...e-ultimate-custom-camper.html#Post403571

I wonder is it the same people or did the name just get sold on.

Fairly certain it was a different group. My Cobra was made in Elkhart, Indiana by Advantage Enterprises. Advantage Enterprises built Advantage, Cobra and Rockwood conversion vans. I know Cobra was around until atleast 2005 as I have seen a 2005 Express with the Cobra conversion. I have also seen a mid 90s G-van that was a Cobra as well.


1983 G20 Conversion Van, 350 TPI, Reed Hydraulic Roller cam, Ported 906 Vortec, Edelbrock 3817 TPI-Vortec Base, Doug Thorley Tri-Ys, Dual 2 1/2" exhaust, Speed Density 7730 ECM tuned by ME, 700r4 by ME, Stock 1,600 rpm converter, Rebuilt Stock 10 bolt with posi by ME, 3.08 gears, 358 RWHP @ 5,200, 384 RWTQ @ 3,400, 14.66 @ 95.43 w 2.28s 60'
Re: 1997 Chevy Express Cobra Conversion
1983 G20 Van #778761 July 10th 2021 1:04 am
Joined: Apr 2007
Posts: 249
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Routed the BP engineering GMT800 fan harness and fitted the radiator today. Tested the fan harness and it works the way it was intended. The harness uses ground triggered relays that will be controlled by the PCM. On low speed with the motors in series for 6 volts it pulls a decent amount of air and virtually silent. Bump up to high speed with the fans in parallel and it moves some air. The fans are 16" Flexalite 3,000 cfm units and the radiator has a 34x19" core. I mounted the relays to the firewall behind where the oil fill tubes and dipsticks sit. The new AN power steering lines and the PS cooler clear everything with plenty of room to spare.

[Linked Image][Linked Image][Linked Image][Linked Image]

Last edited by 1983G20Van; July 10th 2021 1:07 am.

1983 G20 Conversion Van, 350 TPI, Reed Hydraulic Roller cam, Ported 906 Vortec, Edelbrock 3817 TPI-Vortec Base, Doug Thorley Tri-Ys, Dual 2 1/2" exhaust, Speed Density 7730 ECM tuned by ME, 700r4 by ME, Stock 1,600 rpm converter, Rebuilt Stock 10 bolt with posi by ME, 3.08 gears, 358 RWHP @ 5,200, 384 RWTQ @ 3,400, 14.66 @ 95.43 w 2.28s 60'
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