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Old 12-07-2018, 02:10 PM   #1
bigblock73
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Looking for a volunteer...FREE cab corner speaker brackets

I am in the middle of developing 6x9 cab corner speaker brackets for the 55.5-59 GM trucks, and am looking for a volunteer to test fit them into their truck and provide overall feedback.

Here are the details...

I will sent a prototype set to you free of charge, and ask that you install them promptly and provide pictures/feedback.

If they fit perfectly out of the box, they are yours to keep for free.

If they need tweaks, I need to know what they are so I can make those changes, and will then send you another set free of charge to install and keep for your truck.

Please rely here or send me a PM if you are interested, If you live close to Minneapolis MN that would be ideal, so we can do this in person...otherwise shipping out of state is not a concern.

Thanks everyone!
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Old 12-07-2018, 02:31 PM   #2
akdg87
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Re: Looking for a volunteer...FREE cab corner speaker brackets

I live in Alaska and have a cameo that has had the gas tank relcoated. Its readily accessible.. heck id even cover the shipping if its more than you want to spend.
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Old 12-07-2018, 03:01 PM   #3
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Re: Looking for a volunteer...FREE cab corner speaker brackets

I will try them for you and also buy them if they fit good
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Old 12-07-2018, 03:20 PM   #4
bigblock73
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Re: Looking for a volunteer...FREE cab corner speaker brackets

I might end up using you both. PM's coming.
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Old 12-08-2018, 12:59 AM   #5
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Re: Looking for a volunteer...FREE cab corner speaker brackets

when you do a set for an AD series truck, id be interested in testing them.
Mine's a "49 3 window cab with the gas tank removed.
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Old 12-09-2018, 09:52 PM   #6
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Re: Looking for a volunteer...FREE cab corner speaker brackets

If either of the first two don't work out, I'll be glad to try them out. Have relocated tank, replaced both inner & outer cab corners, and in epoxy primer. Just starting on interior.

Cheers, Jim
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Old 12-10-2018, 12:27 PM   #7
57tailgater
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Re: Looking for a volunteer...FREE cab corner speaker brackets

Are these designed to be used with or without the stock gas tank?
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Old 12-10-2018, 01:50 PM   #8
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Re: Looking for a volunteer...FREE cab corner speaker brackets

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Originally Posted by 57tailgater View Post
Are these designed to be used with or without the stock gas tank?
I agree, I also have seat belts in the same general location. Wonder if they would clear.
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Old 12-14-2018, 02:30 PM   #9
bigblock73
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Re: Looking for a volunteer...FREE cab corner speaker brackets

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Originally Posted by 57tailgater View Post
Are these designed to be used with or without the stock gas tank?
Without, tank would obviously be in the way.
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Old 12-14-2018, 02:31 PM   #10
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Re: Looking for a volunteer...FREE cab corner speaker brackets

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Originally Posted by mikebte View Post
I agree, I also have seat belts in the same general location. Wonder if they would clear.
Can you, or someone, please post a picture of the factory seatbelts, installed in a truck? Also, were seatbelts standard on all trucks, optional, and what years?

Thanks!
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Old 12-14-2018, 02:32 PM   #11
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Re: Looking for a volunteer...FREE cab corner speaker brackets

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Originally Posted by nvrdone View Post
when you do a set for an AD series truck, id be interested in testing them.
Mine's a "49 3 window cab with the gas tank removed.
I already have them for the 47-54/55...link in my signature. You can order them from www.73-87.com

Thanks.
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Old 12-14-2018, 02:33 PM   #12
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Re: Looking for a volunteer...FREE cab corner speaker brackets

Quote:
Originally Posted by bowt1ed View Post
If either of the first two don't work out, I'll be glad to try them out. Have relocated tank, replaced both inner & outer cab corners, and in epoxy primer. Just starting on interior.

Cheers, Jim
Thanks Jim, I will let you know. Already have 2 volunteers. Still tweaking the design. These trucks are providing a few challenges for me.
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Old 12-14-2018, 06:35 PM   #13
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Re: Looking for a volunteer...FREE cab corner speaker brackets

No seat belts unless they were installed.Only jack mount on drivers side floor.
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Old 12-14-2018, 06:44 PM   #14
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Re: Looking for a volunteer...FREE cab corner speaker brackets

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Originally Posted by bigblock73 View Post
Can you, or someone, please post a picture of the factory seatbelts, installed in a truck? Also, were seatbelts standard on all trucks, optional, and what years?

Thanks!
Correct as posted. No factory seat belt. On the drivers side a Jack mount in on the floor but most I am sure have been uninstalled if installing a speaker system. I mounted 3 point seat belts in my unit, but a lot of room remains. I'll get you a photo when I can.
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Old 12-14-2018, 09:23 PM   #15
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Re: Looking for a volunteer...FREE cab corner speaker brackets

I have a 59 I’d love try them out in. I’m in the middle of building mine and will need something like this after paint.
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Old 05-27-2019, 05:43 PM   #16
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Re: Looking for a volunteer...FREE cab corner speaker brackets

Alright guys, getting closer! Should have these ready for purchase shortly
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Old 05-28-2019, 12:06 AM   #17
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Thumbs up Re: Looking for a volunteer...FREE cab corner speaker brackets

Look good, put me on your list
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Old 05-28-2019, 06:12 PM   #18
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Re: Looking for a volunteer...FREE cab corner speaker brackets

Looking nice.
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Old 05-28-2019, 07:56 PM   #19
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Re: Looking for a volunteer...FREE cab corner speaker brackets

very nice
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Old 05-29-2019, 08:28 AM   #20
sack54
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Re: Looking for a volunteer...FREE cab corner speaker brackets

They look very good .Progress looks to be coming along fine,they look to be fitting good. Will be painting interior shortly.56: gmc2:
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Old 05-29-2019, 08:51 PM   #21
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Re: Looking for a volunteer...FREE cab corner speaker brackets

I am a long way from being able to use them but once I am, I will be interested for sure. They are looking nice
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Old 05-31-2019, 02:50 AM   #22
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Re: Looking for a volunteer...FREE cab corner speaker brackets

Quote:
Originally Posted by bigblock73 View Post
Alright guys, getting closer! Should have these ready for purchase shortly
I see you are using a big back window cab for fitting. Will these also fit a small back window cab? Not sure if the inside corners are the same? Does anyone know for sure?
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Old 05-31-2019, 10:02 AM   #23
bigblock73
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Re: Looking for a volunteer...FREE cab corner speaker brackets

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Originally Posted by bobinbc View Post
I see you are using a big back window cab for fitting. Will these also fit a small back window cab? Not sure if the inside corners are the same? Does anyone know for sure?
Corners are different, I will be offering two designs. I have a set for each going out today, asking for fitment and general feedback before I offer these for sale.

You can see where I trimmed the right cab corner to mimic that of a small back window. This is the design I am most concerned about, as I don't have a true small window cab. I'll get it right, before any are sold...rest assured.

Last edited by bigblock73; 05-31-2019 at 10:21 AM.
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Old 08-06-2019, 12:25 PM   #24
bigblock73
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Re: Looking for a volunteer...FREE cab corner speaker brackets

Hey gang, just a quick update. Big back window brackets are complete, finalizing the small back window brackets now. I had to buy a cab to get them right, as the big back window is completely different. Additionally, I think I will be able to also offer brackets for both, with in-cab tanks still. I hope to have small back window pics within a couple weeks. At that point in time I will be offering them for sale, price TBD right now, won't know until I place an order to be laser cut from the shop.

Here are some pics of member akdg87's install of a prototype set in his sweet big back window cab.

Thanks for your patience, family priorities derailed me a little in the form a a medical scare for my wife, but all is well now and things are finally getting back to normal.
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Old 08-07-2019, 07:33 AM   #25
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Re: Looking for a volunteer...FREE cab corner speaker brackets

Guess I can finish up and paint my interior now .
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