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#26 |
Registered User
Join Date: Mar 2013
Location: Anaheim Hills, CA
Posts: 323
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Re: Caught the bug -72 K20
Nice looking truck! I like the wheel and tire combo. I was thinking about those wheels for my rig. What size tires are on it right now?
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1971 Cheyenne Big Block Longhorn |
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#27 |
Registered User
Join Date: Dec 2015
Location: Pasadena, MD
Posts: 344
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Re: Caught the bug -72 K20
Thanks for all the feedback. Got the truck tonight but its too dark to mess with it. Cant wait till morning! This thing is a beast for sure! I noticed it had a factory tilt wheel. Is that part of the custom deluxe package? Morning cant come quick enough.
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#28 |
Registered User
Join Date: Oct 2015
Location: Austin Tx
Posts: 58
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Re: Caught the bug -72 K20
Welcome to the forum. That's a great looking truck. I'm new to to the K20 club as well. I hope you enjoy yours as much as I am mine. I burned thru a tank of gas today.
On the hubs: I had to go out and check mine. Looks like they are kind of copperish color. Does that mean they are not stock? |
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#29 |
Senior Member
![]() Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: Caught the bug -72 K20
Someone must have added the tilt which is not a bad thing. Take a picture of the hubs up close and they should be easy to ID for us
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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#30 |
Registered User
Join Date: Dec 2015
Location: Pasadena, MD
Posts: 344
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Re: Caught the bug -72 K20
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#31 | |
Vintage 4x4s
Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
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Re: Caught the bug -72 K20
Quote:
![]() Tilt was a separate option except for being part of the highlander option packages (and there were 3 highlander packages, A, B, and C). I think you had to get B or C to get the tilt. Unless the SPID says SPEC PROMO or something like that, you don't have the option grouping. The easy way to spot highlanders is the plaid seat. Oh, and the only difference between the blue spicers and yellow spicers is the knob. The mechanisms are the same.
__________________
67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades) 67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore ![]() 86 CHV K30 502 th400, apple red NEW 71 CHV K20 350 SM465, ochre (saved work truck) 71 CHV K20 292 SM465, white, tach, PTO, (future project) 72 CHV K20 350 350th, medium blue (project stocker) 01 CHV K2500hd crew, indigo blue ^3 dont run and the others don't see winter either '86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649 '71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642 '72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6 |
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#32 | |
Registered User
Join Date: Dec 2015
Location: Pasadena, MD
Posts: 344
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Re: Caught the bug -72 K20
Quote:
Now that the sun is out I am having fun going over this thing and finding some pretty cool stuff. I will post up some findings and questions later this afternoon. I dont think I was this excited when I bought my Duramax a couple years ago.... ![]() |
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#33 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,391
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Re: Caught the bug -72 K20
Feel under and behind the seat on the chance the build sheet is stuffed under the springs - being a Fremont truck it's possible.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#34 | |
Registered User
Join Date: Dec 2015
Location: Pasadena, MD
Posts: 344
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Re: Caught the bug -72 K20
Quote:
So when the truck arrived last night it was dead, completely dead. Just figured they left something on so I jumped it to get it off the truck. Let it run for a bit (it idled a little rough) and shut it off. Tried to start it again right away and nothing, stone dead. I figure the battery was shot from leaving something on for 1100 miles. I go out today and find what looks like someone has disconnected wires and caused a dead short. I got a body ground with the sheathing melted off and a big #2 copper cable just laying beside the battery not hooked up. I would bet a dollar that the brain surgeons who delivered the truck tried to use the battery for something else on their trip and did not hook it back up right as this is an AUX battery setup. They called yesterday morning saying they were running late because the vehicle in front of mine on the rig was having issues. So Im heading to Auto Zone to pick up some cables and a new battery. I talked to the PO and he ensured me everything was in perfect order when he loaded it and I believe him. I guess these are the things you deal with when you have something shipped. On a side note I have found a few cool things I want to share when I finish up with the batteries. Ill post up this evening. |
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#35 |
Registered User
Join Date: Dec 2015
Location: Pasadena, MD
Posts: 344
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Re: Caught the bug -72 K20
Spent most of the day poking around and getting the electrical issues sorted out. Someone had to have been messing around under the hood after it left the POs house. The Alt wire was disconnected from the battery as was the main Gnd wire to the Alt.
I got those tied back in and charged the battery up and it fired right up. As far as the idle issues I think since the truck came from the upper mid-west, that atmospheric pressure differences were probably causing the low idle. I got that fixed up and she is running well. Could use a little tune up probably but nothing major. I few things I noticed that seem odd are: The fuel gauge does not drop to E when the key is off. It stays at the current fuel level. When I hit the high beam button the lights go out. So I assume the headlights (high or low couldnt tell in daylight) are bad. SO I will pickup some new headlamps and hope thats all it is. There is some crazy wiring going on in this truck that I will need to straighten out when it gets warm. Between the AUX battery, added RV camper plug, add-on intermittent wipers, and the add-on cruise control...I need to clean it up some. One last thing (for now) is the gas tank switch on the floor does not have any noticable "stops". I mean it doesnt feel like it seats in an indent to let you know you are in the right position. Is that normal? Do I need a new fuel switch? There is a cool add-on fuel sending switch under the dash that allows you to see the level of fuel in each tank. Anyway, here are a few pics of the dash stuff which I am guessing are not dealer add-ons. |
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#36 |
Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: Caught the bug -72 K20
You mentioned getting rid of the wiper delay, if it works and you so decide drop me a PM.
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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#37 | |
Registered User
Join Date: Dec 2015
Location: Pasadena, MD
Posts: 344
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Re: Caught the bug -72 K20
Quote:
Okay, I know I am asking a bunch of questions but bare with me.... ![]() I got the charging issue straightened out. I will clean it up a bit once it warms up but for now its working fine. Gauge on dash is not working but thats common and I will trace out that issue later. Fuel selector switch on floor. As mentioned, there are no "stops" in the switch and I do not know what position it should be in to pull from the main tank. Do they make replacement switches and if not, can someone tell me where it should be to pull from the main tank? This may sound REALLY dumb, but could someone explain the selections for the AC/Heater controls? Should the top lever or the middle lever control the A/C? The middle lever seams to select between vents on dash or vents on floor. Last one is not a question but a , WOW. This rear has at least 4.10's in it. The tach reads about the same as the speedo...lol. Seriously though I am doing 3000rpms at 50mph... ![]() |
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#38 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,964
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Re: Caught the bug -72 K20
Here's a pic of the placard. It would be installed such that as if you were sitting in the truck looking down at your switch, the letters would be right side up. So, in the pic above, you're set up to be drawing fuel from the right aux tank (if there is one). If you want to draw from the main, point the short arrow end of the selector valve aft. Outboard for the left aux tank (or, NL2 tank - factory aux). I'm guessing you have all dealer or owner installed aux tanks, and the fuel lines indicate you still have 3 total tanks - and there's no NL2 on the SPID. I believe pointing it toward the front of the truck acts as a fuel shutoff - the opening in the valve is not ported to any of the fuel lines. This is all assuming your fuel lines are routed appropriately - who knows - may want to crawl under and trace them back... (the dash placard is just for fuel gauge selection, if your aux tanks even have senders - check for wires).
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#39 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,964
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Re: Caught the bug -72 K20
Oh, and by the way - Marine valves are the same type as the ones in our trucks. Here's a 4 -port (they also have 3 port versions). http://www.starmarinedepot.com/moell...CokaAhkW8P8HAQ
Need to confirm whether they are counting inlets only or all inlets/outlets. i.e. not sure if the 4 port or 3 port is for a 3-tank (total) config). From the looks of it, 4 port is correct. |
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#40 | |
Registered User
Join Date: Dec 2015
Location: Pasadena, MD
Posts: 344
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Re: Caught the bug -72 K20
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#41 | |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,394
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Re: Caught the bug -72 K20
Quote:
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's |
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#42 |
Registered User
Join Date: Dec 2013
Location: Durango, CO
Posts: 827
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Re: Caught the bug -72 K20
Unlike a modern vehicle, the fuel gauge will stay at its actual level when the truck is off. Or, at least, mine did.
RE: rear diff ratio, I've been wondering what a 350/350/4.10 combo would be like on the open road. Now I know, thanks! 3k at 50mph is a bit much. That's one of the things that's pushing me towards another K10 instead of a K20 - the 3.73 ratio typically found in the K10s.
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1972 K10 Cheyenne Super | LWB, fleetside | 350/350/205 | KEEPER 1971 K10 Cheyenne | SWB, fleetside | LS Swap 5.3/4L60 | SOLD 1976 Trans Am | 400/4-spd | SOLD 1976 Trans Am | 455/4-spd | TOTALED ![]() Last edited by joeydurango; 12-20-2015 at 04:29 PM. |
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#43 |
Registered User
Join Date: Jan 2015
Location: Los Angeles California
Posts: 927
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Re: Caught the bug -72 K20
I bet the speedo is off. Make sure you really are doing 50mph with a GPS app.
4.10 with 33s @50 is around 2100rpm, even with 4.56 you are still around 2300. http://www.ringpinion.com/Calculators/Calc_RPM.aspx |
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#44 |
Registered User
Join Date: Dec 2013
Location: Durango, CO
Posts: 827
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Re: Caught the bug -72 K20
Good call, RedRoad...
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1972 K10 Cheyenne Super | LWB, fleetside | 350/350/205 | KEEPER 1971 K10 Cheyenne | SWB, fleetside | LS Swap 5.3/4L60 | SOLD 1976 Trans Am | 400/4-spd | SOLD 1976 Trans Am | 455/4-spd | TOTALED ![]() |
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#45 | |
Registered User
Join Date: Dec 2015
Location: Pasadena, MD
Posts: 344
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Re: Caught the bug -72 K20
Quote:
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#46 |
Vintage 4x4s
Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
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Re: Caught the bug -72 K20
I like the fuel sender switch on the dash. Would like to find a couple of those sometime. As for your question on the selector valve, mine doesn't have detents either. They are just a cylinder with holes inside of a block with holes. There is no spring/latch component that would give you feedback you're in the right position.
__________________
67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades) 67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore ![]() 86 CHV K30 502 th400, apple red NEW 71 CHV K20 350 SM465, ochre (saved work truck) 71 CHV K20 292 SM465, white, tach, PTO, (future project) 72 CHV K20 350 350th, medium blue (project stocker) 01 CHV K2500hd crew, indigo blue ^3 dont run and the others don't see winter either '86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649 '71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642 '72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6 |
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#47 |
Registered User
Join Date: Dec 2015
Location: Pasadena, MD
Posts: 344
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Re: Caught the bug -72 K20
Thanks for the info. I was waiting to feel a click of some sort letting me know I was in the right spot. Good to know that isn't the case with these valves.
__________________
1972 K-20 Custom Camper 1971 K2500 Custom Camper (Sold) 2014 GMC 2500HD DMAX |
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#48 |
Registered User
![]() Join Date: Aug 2013
Location: Atlanta, GA
Posts: 702
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Re: Caught the bug -72 K20
Welcome to the K club. Great truck. Congrats.
__________________
1968 C10 292/3 spd - sold 1969 K10 350/3 spd/205 - sold 1971 K5 350/4 spd/ 205 - sold 1970 K20 350/350/205 - sold 1969 K20 396/400/205 - work in process |
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