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#101 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Agreed. Early winter the plan was to pull the engine so I could work on it in the garage, so I pulled off the front grille and bumper, etc. to get access, then LIFE got in the way. The truck itself is TOO BIG to fit in my garage, so I parked it and couldn't legally drive it without bumpers. Then the snow came and that was the end of that plan. Glad spring is finally here and I can get back to it!
__________________
1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 |
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#102 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Just ordered a poly gas tank and I already have the sending unit. Along with replacing those, I am going to rebuild the carb using Cliff's High Performance kit and book. Hopefully I can get this thing running better, and eliminate the hard starts, before moving on to the next thing. Glad the good weather is back!
__________________
1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 |
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#103 |
Registered User
Join Date: Jul 2010
Location: Sutton, MA
Posts: 130
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Re: 1971 K20 Rat Rod Resurrection
Hey I had emailed you a few weeks ago when you had this listed for sale. Glad to see you are keeping it and bringing it back. I ended up picking up a 69 C10. My sheet metal showed up yesterday so work will start this weekend hopefully. We'll have to get the two trucks together at a show sometime!
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#104 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Sorry didn't see the email. I half-hearted listed it. So much to fix I just don't know what to do. In the meantime I will move forward.
Like today! Finally! I fixed something that actually mattered on this beast! I got an MTS poly fuel tank on Ebay for $170 delivered. I had an LMC sending unit that the previous owner gave me when I bought the truck. Spent a few hours today getting the old tank out (which looks original to the truck) and the new one in, hooked up, and fueled! Success! Now I know what12 gallons of gas looks like on the fuel gauge (see pic)!!! ![]() The old tank was in pretty bad shape and leaking from the seams. Also, I spilled a little fuel getting it out - and it was slick and blackish. No wonder I couldn't get any oomph when I stepped on the go pedal.... Once the clean fuel was in, the truck started right up, no more choppy start, and the tone of the engine/pipes is totally better now. Much smoother! The engine revs up and winds down without any glug. There is a noticeable snappiness to the acceleration as well! If anyone is driving around with an old tank, I highly recommend swapping out. Your engine will love you for it! ![]()
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1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 |
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#105 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Woohoo! Just got a rot free Tailpan shipped from California. Bought it from Cheyenne Shortstep on this board. Don't know how I would have found one around here that isn't all rotted out. This will allow me to reattach the tailgate hinges to the truck so that my tailgate doesn't flop freely.
Now....just to figure out how to swap it in without tearing apart the whole truck.....
__________________
1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 |
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#106 |
Registered User
Join Date: Sep 2012
Location: Midway, NC
Posts: 3,275
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Re: 1971 K20 Rat Rod Resurrection
Don't know what I'm looking at but that surely looks likes fun ahead.....oh boy.
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http://67-72chevytrucks.com/vboard/s...d.php?t=581873 The low buck build threads. Check'em out! http://67-72chevytrucks.com/vboard/s...d.php?t=666022 My build thread Crossmembers CC |
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#107 | |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Quote:
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#108 |
Registered User
Join Date: Sep 2012
Location: Midway, NC
Posts: 3,275
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Re: 1971 K20 Rat Rod Resurrection
Cool man. I thought that might be what it was but wasn't really sure. Good luck!
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http://67-72chevytrucks.com/vboard/s...d.php?t=581873 The low buck build threads. Check'em out! http://67-72chevytrucks.com/vboard/s...d.php?t=666022 My build thread Crossmembers CC |
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#109 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,481
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Re: 1971 K20 Rat Rod Resurrection
-
We like progress... ![]() LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#110 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Damn. I just happened to be looking into transmissions and rear ends, thinking about trying to improve highway driving and I come across the fact that I think the P.O. screwed me once again. Apparently, what is supposed to be a 'hypoid, full floating type, ratio 4.57" rear axle ISN'T. Being a complete newbie, I had no idea that this rear is only an 8.5" 10-bolt rear - which is NOT the original rear axle for the 1971 K20 Suburban!! Am I wrong on this, anyone??
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1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 |
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#111 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Ah Ha! Well, it was driving me nuts and I kept looking at pics of 10-bolts and the axle housings didn't look the same, so I went out an checked the stamping on the differential. Based on some googling it is an Eaton! Good to know. looks like it is at least 3/4 ton.
__________________
1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 |
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#112 |
Registered User
![]() Join Date: Sep 2008
Location: NEW MILFORD NJ
Posts: 1,453
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Re: 1971 K20 Rat Rod Resurrection
yup that's an eaton ho52
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#113 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Even better! Based on the pics in this thread (thanks jbclassix!!) http://67-72chevytrucks.com/vboard/s...d.php?t=536119 it looks to me like someone before me already swapped the brakes from the 14 bolt onto the Eaton! Will have to go back out and confirm it tomorrow!
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1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 |
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#114 |
Registered User
Join Date: Jan 2015
Location: napa, ca
Posts: 249
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Re: 1971 K20 Rat Rod Resurrection
It has load bolt so it should be a H072
Very limited in gears. 4.10, 4.56, 5.13(I think). And nobody is making gears for them
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Mine: 72 c20 Chevy suburban, 02 5.3 w/4l60e , factory ac and 50gal tank. 70 k10 Chevy burb, 04 5.3 w/4l60e np241, with dual 30gal saddle tanks and rear 30 gal tank Dads: 67 c10 step side(project) 72 c10 GMC burb 350/400, with 67 Chevy front clip(grocery getter) Ours: 67 c30 tow truck 70 c10 long bed 383stroker w/digital gauges(work truck) |
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#115 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Turns out the casting number on my intake manifold is not necessarily for a corvette. It is 3973469 which is all passenger cars, Cast Iron, 270 Hp for a 1971 350sbc. So perhaps it is original...
I am certain however that the carb is not. It has an identification number of 7042237 which is apparently for a 1971 Cadillac 7.7L 472 engine or 8.2L 500 engine. Woah. Perhaps it is a refurb that was metered to work with this application? I think I will be in the market for a new, correct, Quadrajet... According to the chart below I need to be looking for one that is numbered 7042210. However, according to cliff's High Performance ID page http://www.cliffshighperformance.com...carb_ID_2.html The following numbering convention applies: 70 = Rochester 4 = 1970-1975 era 1 = 1971 model year 2 = Quadrajet 4BBL Federal Standards 0,1 or 2 = Chevrolet 0,2,4,6 or 8 = automatic transmission So I need a carb with one of the following numbers: 7041200, 7041202, 7041204, 7041206, 7041208 7041210, 7041212, 7041214, 7041216, 7041218 7041220, 7041222, 7041224, 7041226, 7041228 Does anyone know whether the variations on the Chevrolet numbering or the automatic transmission numbering matter? In other words, does it matter, for correctness, whether I get a carb with any of the 15 numbers above, or will any one do? Thanks
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1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 Last edited by chewiebarker; 07-24-2015 at 01:48 PM. |
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#116 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
so....according to carbs unlimited a carb with the number 7041200 is for a 402 of 454 engine
http://www.carburetion.com/Number/oe...number=7041200 yet, a carb with the number 7041202 is for the 270hp 350... http://www.carburetion.com/Number/oemnumber.asp So, answering my own question, it apparently does matter. I will have to investigate further.
__________________
1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 |
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#117 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Based on searching the database at Carbs Unlimited (links above) I was able to identify the following carb number as correct for a 1971 K20 Suburban with a 350 - 7041208
Does anyone know whether the other carbs listed below for use with 350s (but in other applications) is more appropriate given that my vehicle has an intake manifold that is #3973469 GM2 ?? Should I go with the truck carb or the others given what I know? Does it even matter or all they all the same at this point of specificity? Help a rookie out!! please.
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1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 Last edited by chewiebarker; 07-24-2015 at 02:37 PM. |
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#118 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Fantastic detail on this guys' page TuningByLars (it is a pdf)
http://www.google.com/url?sa=t&rct=j...98717601,d.cGU
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1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 Last edited by chewiebarker; 07-24-2015 at 02:27 PM. |
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#119 |
Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: 1971 K20 Rat Rod Resurrection
My '72 Corvette has a '72 truck quadrajet on it. It seems to hook up and function just fine
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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#120 |
Registered User
Join Date: Sep 2012
Location: Midway, NC
Posts: 3,275
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Re: 1971 K20 Rat Rod Resurrection
Glad you are able to start decoding the past. It amazes me how much a vehicle can go through with different owners, lol.
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http://67-72chevytrucks.com/vboard/s...d.php?t=581873 The low buck build threads. Check'em out! http://67-72chevytrucks.com/vboard/s...d.php?t=666022 My build thread Crossmembers CC |
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#121 |
Registered User
Join Date: Feb 2009
Location: Southern Oregon
Posts: 1,352
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Re: 1971 K20 Rat Rod Resurrection
Have you thought about just having your carb rebuilt specifically to your rig? I realize it may not be numbers matching but it would probably perform better. Google Sean Murphy Induction in California or SMI. Cliff Ruggles is another name that comes to mind but I think he is at least a couple months out.
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1967 C10 Suburban 454/TH400/3.07's An Average Joe and His 'Burb: http://67-72chevytrucks.com/vboard/s...d.php?t=775843 |
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#122 |
Registered User
![]() Join Date: Feb 2014
Location: Boxford, MA
Posts: 364
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Re: 1971 K20 Rat Rod Resurrection
Average Joe,
I didn't realize that was really an option. It doesn't really matter to me whether I have a numbers matching carb, so long as it is properly working. I am driving my Burban daily now, as I am in-between cars, but I don't know how to determine whether the carb is operating properly/efficiently. Once I secure a new vehicle for daily driving, I am going to pull this engine for rebuild. It will take some time, so perhaps I will contact Cliff and ask questions. Thanks
__________________
1971 K20 Suburban 2012 LS1500 4WD Suburban 2003 Honda Accord LX V6 (don't tell anyone) MY 'BUILD' THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=618915 |
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#123 |
Registered User
Join Date: Jul 2010
Location: Sutton, MA
Posts: 130
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Re: 1971 K20 Rat Rod Resurrection
How are you making out with the truck? I have another big order showing up from GMC Paul's, but haven't made much progress on mine. Who knew having a kid would eat up so much time hahaha!
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#124 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,481
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Re: 1971 K20 Rat Rod Resurrection
Quote:
That has put the skids on a lot of peoples projects... ![]() LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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1971 k20, 4wd, intro, rat rod |
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