hard top mounting question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hgs_notes · 09-02-2009, 12:37 AM

All the blazers/jimmys I've had so far came with single wall tops. So I'm familiar with how they are bolted in. But the yellow tub I bought for my 2wd came without a top, and the bed rails just have holes, no threaded plates. Is this how the double wall tops were set up normally? If I want to use a single wall top, do I just need to use nuts and washers then to bolt it down?

red71cheyenne · 09-02-2009, 02:04 AM

Right, double wall tops bolt up from the bottom, there's a strip inside the top with captive nuts for the bolts to thread into. If using a double wall top, I'd run a tap through the holes to clean them out real well prior to. Can't remember if they are 3/8 or 5/16 though. Someone else on the board will know for sure tho.

hgs_notes · 09-02-2009, 09:16 AM

Thanks for the info. So it looks like I can use either top easily enough.

litebulblsc · 09-02-2009, 11:05 AM

I believe the single and dual wall tops bolt holes are in different locations, so you would have to drill new holes for the single wall top

tdkosta · 09-02-2009, 01:45 PM

Quote:

Originally Posted by red71cheyenne

Can't remember if they are 3/8 or 5/16 though. Someone else on the board will know for sure tho.

Anyone recall the size of the bolts?

FRENCHBLUE72 · 09-02-2009, 03:32 PM

They do bolt on on different locations on the bed rails.. I use carb studs to bolt on my double wall top...

Otsa580 · 09-02-2009, 07:30 PM

I saved this off a previous thread:

5/16 coarse thread I believe 18 thread. You can drill and tap to 3/8 if you need to.

09-02-2009, 12:37 AM	#1
hgs_notes GEARHEAD Join Date: Aug 2003 Location: MN Posts: 6,126	hard top mounting question All the blazers/jimmys I've had so far came with single wall tops. So I'm familiar with how they are bolted in. But the yellow tub I bought for my 2wd came without a top, and the bed rails just have holes, no threaded plates. Is this how the double wall tops were set up normally? If I want to use a single wall top, do I just need to use nuts and washers then to bolt it down? __________________ If no one knows what you're doing, they can't tell you you're doing it wrong HG's Dream Car Build - Shelby Cobra Kit Build your own adjustable track bar 71 Long Fleet C/10 72 Jimmy 4x4 (Junkyard Jimmy) HG's Plow Truck '78 K35 Dually Bigass Farm Truck HG's thread of miscellaneous stuff

09-02-2009, 02:04 AM	#2
red71cheyenne Back in the sticks Join Date: Jan 2001 Location: Fordland, MO Posts: 3,188	Re: hard top mounting question Right, double wall tops bolt up from the bottom, there's a strip inside the top with captive nuts for the bolts to thread into. If using a double wall top, I'd run a tap through the holes to clean them out real well prior to. Can't remember if they are 3/8 or 5/16 though. Someone else on the board will know for sure tho. __________________ 1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty

09-02-2009, 09:16 AM	#3
hgs_notes GEARHEAD Join Date: Aug 2003 Location: MN Posts: 6,126	Re: hard top mounting question Thanks for the info. So it looks like I can use either top easily enough. __________________ If no one knows what you're doing, they can't tell you you're doing it wrong HG's Dream Car Build - Shelby Cobra Kit Build your own adjustable track bar 71 Long Fleet C/10 72 Jimmy 4x4 (Junkyard Jimmy) HG's Plow Truck '78 K35 Dually Bigass Farm Truck HG's thread of miscellaneous stuff

09-02-2009, 11:05 AM	#4
litebulblsc Registered User Join Date: Aug 2006 Location: LaSalle Mi Posts: 525	Re: hard top mounting question I believe the single and dual wall tops bolt holes are in different locations, so you would have to drill new holes for the single wall top

09-02-2009, 03:32 PM	#6
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	Re: hard top mounting question They do bolt on on different locations on the bed rails.. I use carb studs to bolt on my double wall top... __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

09-02-2009, 07:30 PM	#7
Otsa580 I Love Rusty Chevys Join Date: Jan 2009 Location: Omaha, NE Posts: 617	Re: hard top mounting question I saved this off a previous thread: 5/16 coarse thread I believe 18 thread. You can drill and tap to 3/8 if you need to. __________________ 1969 K5 Blazer 1997 1500 Silverado Ext Cab Z71 2010 1500 Silverado Ext Cab Z71 Last edited by Otsa580; 09-02-2009 at 07:33 PM.

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