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12-25-2011, 10:06 PM | #1 |
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Join Date: Dec 2011
Location: austin,tx
Posts: 47
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gas tank conversion problems
Everybody says this an easy project. So far i've had to remove the rivets on the spare tire cross bar, notch the cross sill bar, drill 2 holes on the frame and i've also notched a piece out of the frame to allow for space for the filler neck on the tank. It seems like 1 of the tank straps is inside out. my Question is do i need the straps? Can I bolt the tank to the frame and call it a day. I can't figure out why i need the straps. I'm using the metal 69-72 blazer/suburban tank from american classic. This tank looks exactly like the tanks from everybody else. This is going on a 63 short bed fleetside btw. I have looked at tons of posts but there are too many variations to find the answer i'm looking for.
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12-26-2011, 09:32 PM | #2 |
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Location: Chickasha, OK
Posts: 182
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Re: gas tank conversion problems
glad to know im not the only one that had major issues with the cpp instructions. when you pay that kind of money for a tank, you expect it all to bolt right in... im done with cpp after this. and they didnt wanna help me out when i called them out on it. the tank was great but everything else was a MAJOR thumbs DOWN!!!
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12-26-2011, 10:40 PM | #3 |
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Join Date: Dec 2011
Location: Brandon, MS
Posts: 10
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Re: gas tank conversion problems
No CPP tank. Got it..
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12-27-2011, 01:08 AM | #4 |
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Join Date: Dec 2011
Location: austin,tx
Posts: 47
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Re: gas tank conversion problems
Yeah, from everything i read the 69-72 blazer/suburban tank was suppose to be virtually plug and play. I've had to fabricate and modify alot of stuff already and i'm still not finished. For anybody that is considering this mod i think the more expensive but simpler looking tanks could be the way to go. By the way, I'm guessing that no matter where you get the blazer tank from its going to be made in china.
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12-27-2011, 02:06 AM | #5 |
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Join Date: Dec 2011
Location: austin,tx
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Re: gas tank conversion problems
I guess i'll take everyone's advice and use the straps . Wouldn't have been so difficult if they were both the same. Thanks everyone for the advice!
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01-12-2012, 10:12 PM | #6 |
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Join Date: Dec 2011
Location: EL Mirage , Az
Posts: 55
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Re: gas tank conversion problems
To the original poster. The tank in my truck is from a 69-72 K5 blazer and it fits perfectly.Some of the flanges had to be bent up towards the front but that's because of the "C" notch
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Chuck D 66 C10 LS6/4L65e Last edited by Clownpuncher; 01-12-2012 at 10:25 PM. |
01-13-2012, 12:10 AM | #7 |
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Join Date: Dec 2011
Location: austin,tx
Posts: 47
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Re: gas tank conversion problems
Mine is a reproduction from china so I'm guessing its close but not exactly the same as an original 69-72 blazer tank. It does fit but I still had to do alot of stuff to it and the truck to make it work.
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01-13-2012, 12:24 AM | #8 |
Zero Albedo
Join Date: Mar 2009
Location: San Gabriel, California
Posts: 478
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Re: gas tank conversion problems
Just today I installed a 50 gallon tank in my panel- bolted to the frame-for detalis check the panel thread in my sig
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Baz "Deserve's got nothin' to do with it." 66 GMC 1500 wideside longbed 250 4spd "Project Rekker"http://67-72chevytrucks.com/vboard/s...d.php?t=467467 65 GMC 1Ton Panelhttp://67-72chevytrucks.com/vboard/s...32#post4794432 65 Chevy Panel (former U.S.Navy truck) 64 Chevy Suburban Carryall 4x4http://67-72chevytrucks.com/vboard/s...d.php?t=358348 64 GMC 1000 wideside longbed 305 4spdhttp://67-72chevytrucks.com/vboard/s....php?p=3600890(Rip- parts truck now) 68 Dodge Charger |
01-13-2012, 12:31 AM | #9 |
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Join Date: Dec 2011
Location: Creighton Sask. Canada
Posts: 4,121
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Re: gas tank conversion problems
I don't know if any of them are to easy, i put a poly sub tank in the rear of my 71, no fun at all, a lot of mods. But it's done now and way better than in the cab. Got some in cab room now, not quite an extended cab but enough for a sub box.
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01-13-2012, 06:52 AM | #10 |
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Join Date: Nov 2011
Location: Hutto Texas
Posts: 114
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Re: gas tank conversion problems
I bought the 21 gallon tank from LMC and didn't have any problems except the crossmember for the filler tube, but I guess that is why these trucks are fun, challenging but real satisfaction when done.
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01-13-2012, 09:30 AM | #11 |
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Join Date: Feb 2011
Location: Senatobia, MS
Posts: 1,297
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Re: gas tank conversion problems
I purchased the 19 gal from POL. As with the CPP kit, the tank looks good and installs well but i had the exact same issues with the sending unit as others have. Only worked if you 'clocked' it and if you follow their instructions, it ended up being cut incorrectly. I was reading empty with about 7-8 gallons still in the tank.
Their customer service however, was fantastic and they sent me another sending unit no questions asked.
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01-13-2012, 07:35 PM | #12 | |
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Join Date: Oct 2011
Location: Venice, CA
Posts: 32
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Re: gas tank conversion problems
Quote:
I am in the process of going through all the issues with the truck, how did you "clock" the sending unit? Seems like easy access with no bed floor - just not sure what resistance I should be getting off the sending unit back to the dash for "E" "1/2" and "F" |
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01-14-2012, 04:06 AM | #13 | |
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Join Date: Nov 2010
Location: Meridian, Idaho
Posts: 422
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Re: gas tank conversion problems
Quote:
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1963 Chevy stepside 327 1965 Chevy swb 383 1996 Mystic Mustang Cobra 2009 Pontiac G8 GXP 415hp/415tq 6speed |
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01-14-2012, 05:40 AM | #14 |
454 club
Join Date: Oct 2002
Location: Oklahoma
Posts: 1,348
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Re: gas tank conversion problems
thanks for the pictures. I am proball going to go with the cpp tank.
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David 1965 Chevrolet c-10 454 automatic Custom bbw swb. 1965 Chevrolet C-10 swb (Sold) 1963 Chevrolet C-10 6 Cyl automatic with dual exhaust, pb, ps and 17's. R.I.P "I will miss you. 1967 Chevrolet C-10 6 Cyl Custom lwb 1939 Chevrolet Coupe, 350 v8 automatic. 1935 Chevrolet 2 Dr Standard in the works. 2015 Harley Davidson Street Glide. 2023 Chevrolet Stingray Z51 Convertible. I never want to grow up. |
01-13-2012, 10:02 AM | #15 |
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Location: Oklahoma
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Re: gas tank conversion problems
Will the cpp tank hang to low if the truck has air bags? was you able to get the sending unit to read with the factory guages or are you using an after market guage.
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David 1965 Chevrolet c-10 454 automatic Custom bbw swb. 1965 Chevrolet C-10 swb (Sold) 1963 Chevrolet C-10 6 Cyl automatic with dual exhaust, pb, ps and 17's. R.I.P "I will miss you. 1967 Chevrolet C-10 6 Cyl Custom lwb 1939 Chevrolet Coupe, 350 v8 automatic. 1935 Chevrolet 2 Dr Standard in the works. 2015 Harley Davidson Street Glide. 2023 Chevrolet Stingray Z51 Convertible. I never want to grow up. |
01-13-2012, 04:46 PM | #16 | |
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Location: Meridian, Idaho
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Re: gas tank conversion problems
Quote:
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1963 Chevy stepside 327 1965 Chevy swb 383 1996 Mystic Mustang Cobra 2009 Pontiac G8 GXP 415hp/415tq 6speed |
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01-13-2012, 01:19 PM | #17 |
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Location: Orange, CA
Posts: 525
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Re: gas tank conversion problems
Anyone use the universal fuel cells from summit or jegs?
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01-13-2012, 05:07 PM | #18 |
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Location: Beaverton, OR
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Re: gas tank conversion problems
The RCI 17 gallon is 30" L x 17" W x 7" H and if you trim the inside of the top of the frame rail, it sits nice. My bed will me raised, so the extra few inches aren't an issue.
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01-14-2012, 02:56 AM | #19 |
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Join Date: Dec 2011
Location: EL Mirage , Az
Posts: 55
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Re: gas tank conversion problems
Not the best picture but here is my truck with a 69-72 K5 Blazer tank
It would only work if you had a raised bed floor, Unless you strapped it but I think then it would sit to low. To me this looks like the same tank Brother's uses as their kit to move the 60-72 gas tanks under the bed.
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Chuck D 66 C10 LS6/4L65e |
12-26-2011, 01:25 PM | #20 |
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Location: Meridian, Idaho
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Re: gas tank conversion problems
Could be some very valid points. Another thought process could be it was easier for the factory to not make a tank with flanges strong enough to bolt to the frame and two straps with only one nut on each strap was cheaper and quicker. As for ease of installation, I installed the cpp aluminum tank and it bolted right in to the frame just fine, although the sending unit instructions were completely wrong.
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1963 Chevy stepside 327 1965 Chevy swb 383 1996 Mystic Mustang Cobra 2009 Pontiac G8 GXP 415hp/415tq 6speed |
12-27-2011, 01:26 AM | #21 |
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Join Date: Feb 2007
Location: Spokane Valley, WA
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Re: gas tank conversion problems
I agree with the concept that straps are needed on a tin tank originally designed to be attached in that manner. Bolting the flanges to the frame will likely rupture the tank after enough twisting frame cycles.
I have a custom Rock Valley tank that holds 33 gallons. Mine bolts to the frame rails via welded angle flanges on the side ends of the tank. I had some concerns about long term strength because of the weight, and the fabricators resolved the problem by making the end panels and brackets twice as thick as the tank, which is already 2-3 times thicker than the stock tank. I'd worry about using this mounting method unless if was a tank designed for the purpose like the Falcon tank. |
12-27-2011, 02:06 AM | #22 |
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Join Date: Nov 2010
Location: Meridian, Idaho
Posts: 422
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Re: gas tank conversion problems
I really like the CPP aluminum tank with the flanges bolting the the frame. It fit right in. They just give you a universal sending unit and then give you instructions that say not to rotate it and to cut it to a certain length. Then it won't work without rotating it and the sending unit will be cut to the wrong length. Each purchase I have made through them results in a problem that they steer me the wrong way, or have no idea of what to tell me, as in the case of my emergency brake cables that they could never tell me how to hook up. That's once they manage to get the parts that are really really late. But, like I said, I like the tank.
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1963 Chevy stepside 327 1965 Chevy swb 383 1996 Mystic Mustang Cobra 2009 Pontiac G8 GXP 415hp/415tq 6speed |
12-27-2011, 03:27 AM | #23 |
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Join Date: Mar 2011
Location: Tucson, Arizona
Posts: 2,084
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Re: gas tank conversion problems
There are many tanks in autos that are bolted directly to the frame or subframe including the Falcon tank mentioned above and the Mustang tanks, and many others. I have an early mustang tank that I bolted directly to the underside of the top frame rail and is sandwiched between the frame rail and a 1" wide steel strip. I don't see a problem with bolting to the frame rails unless you are doing some major frame twisting launches in racing or in rock crawling. The frame and the crossmembers are very stout. You might have a problem if you don't have any suspension underneath but that's unlikely.
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12-27-2011, 06:13 PM | #24 |
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Location: Madera, California
Posts: 291
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Re: gas tank conversion problems
I put the CPP tank in also and had the side mount filler. I had to cut the frame also and bolting the tank wasn't that bad just drilling the holes were fun. In retrospect I would have looked for a tank that the filler hose goes above the frame. I think early classic has one out of stainless steel. Just the price of 700 plus was a little high for me this time.
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12-28-2011, 04:48 PM | #25 |
"Where were you in '62?"
Join Date: Jul 2004
Location: Cleveland County, North Cackalacky
Posts: 5,013
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Re: gas tank conversion problems
You can take a look on how I done mine on my Ole' truck.
http://67-72chevytrucks.com/vboard/s...d.php?t=321173 https://skydrive.live.com/?sc=photos...1365&sc=photos Posted via Mobile Device
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