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01-21-2026, 11:17 PM
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#1 |
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Senior Member
 
Join Date: Apr 2008
Location: Berne IN
Posts: 3,418
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72 GMC K5500 Napco big dog
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71 C10 72 K20 72 K10 Super Kirk |
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01-21-2026, 11:59 PM
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#2 |
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Ram-A-Lam-A-Ding-Dong
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 11,899
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Re: 72 GMC K5500 Napco big dog
Man, that is AWESOME!
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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01-22-2026, 10:23 AM
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#3 |
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Registered User
Join Date: Feb 2016
Location: Portland Oregon
Posts: 12,407
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Re: 72 GMC K5500 Napco big dog
Too cool! I love the part about no park function in the transmission and having to chock the wheels because the drive shaft brake won't hold 14,000 lbs.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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01-22-2026, 11:09 AM
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#4 |
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Senior Member
Join Date: Aug 2013
Location: Ca. <-> Ma.
Posts: 5,957
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Re: 72 GMC K5500 Napco big dog
Great story
Love how he solved his tire problem |
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01-23-2026, 12:46 AM
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#5 |
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Senior Member
Join Date: Aug 2005
Location: Los Angeles
Posts: 1,457
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Re: 72 GMC K5500 Napco big dog
Years ago, it wasn't uncommon to see those Toroflow diesels swapped into pickup trucks. They were based on the gas V-6's and used the same mounts and bell housing bolt pattern. There were rumors GMC was even considering making the small 351 cubic inch Toroflow an option in 2500 and 3500 GMC's.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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01-23-2026, 01:25 AM
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#6 |
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Registered User
Join Date: Dec 2024
Location: Post falls ID
Posts: 165
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Re: 72 GMC K5500 Napco big dog
Wow that thing is amazing!
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01-23-2026, 02:35 PM
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#7 |
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Born Psycho
Join Date: Feb 2001
Location: brentwood,cal,usa
Posts: 5,019
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Re: 72 GMC K5500 Napco big dog
That thing is beyond cool
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jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA |
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01-23-2026, 03:30 PM
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#8 |
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Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,364
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Re: 72 GMC K5500 Napco big dog
Another vid on the truck and it's twin.
https://youtu.be/a5vw6rDmsHo |
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