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#1 |
Registered User
Join Date: Apr 2017
Location: Knoxville, Tennessee
Posts: 891
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Help Identify This Replacement SBC
First post.
Finally bought myself a money pit😄 1972 GMC 1500 Super Custom 350/350. I'm looking for some help identifying this motor. The suffix does not show up on any of the websites like nastyz28. Thanks in advance. |
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#2 |
Registered User
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Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Help Identify This Replacement SBC
GOODWRENCH replacement motor
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68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive |
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#3 |
Registered User
Join Date: Apr 2017
Location: Knoxville, Tennessee
Posts: 891
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Re: Help Identify This Replacement SBC
Well, yes. But any ideas about the specs? I know it was made in Flynt. Beyond that, don't know. 2 or 4 bolt? Original HP?
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#4 |
Registered User
Join Date: Nov 2014
Location: Bigfork, Montana
Posts: 1,137
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Re: Help Identify This Replacement SBC
because it's goodwrench engine, info on the stamped #s may be limited. You might want to pull the casting #s & try those. Anyway, looks like a base 350, specs somewhere around 200 HP.
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#5 | |
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Join Date: Apr 2017
Location: Knoxville, Tennessee
Posts: 891
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Re: Help Identify This Replacement SBC
Quote:
Since I'm not burdened with keeping the engine original, was contemplating a limited budget performance bump with this as the foundation.
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1969 GMC K25 2007 Chevy 2500HD Classic Duramax 1999 Tahoe 2DR 4WD Base Model 5.7l |
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#6 |
KEEP ON TRUCKIN'
![]() Join Date: Jun 2005
Location: Sterling, Va.
Posts: 5,731
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Re: Help Identify This Replacement SBC
Here's a link I found. This is for a stock GM Crate motor. : http://www.jegs.com/p/Chevrolet-Perf...52506/10002/-1
Specifications •4-bolt main with 2-piece rear main seal •Nodular iron crankshaft •4.000" bore x 3.480" stroke •Internal balance •LT1/LT4 powdered metal connecting rods •Cast aluminum pistons (dished) •8.5:1 compression ratio •Hydraulic flat tappet cam (.383"/.401" Lift, 194 / 202 Duration @ .050", and 112° lobe separation) •Cast iron cylinder heads with 76cc chambers •1.940" Intake / 1.500" Exhaust valves •1.250" diameter valve springs •1.5:1 ratio rocker arms •3/8" pressed-in rocker studs •Block is compatible with left or right side oil dipstick (Requires Plug for Unused Side - sold separately) - p/n 809-14091563 left side plug; or p/n 809-9421743 right side plug •4-quart oil pan •Oil pump, oil pump pickup and oil pump drive shaft installed •Includes timing tabs for a 6-3/4" or an 8" balancer (balancer not included) •Recommended spark plug: 14mm thread, .460" reach, 5/8" hex, tapered seat, projected tip (AC Delco p/n 065-R45TS, Autolite p/n 417-144) •Requires p/n 809-19299222 or p/n 555-23605 Oil filter adapter (not included) Hope this helps. If this is the motor you have, it's a great foundation to start with.
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#7 |
Registered User
Join Date: Apr 2017
Location: Knoxville, Tennessee
Posts: 891
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Re: Help Identify This Replacement SBC
Hopefully, that's it. The blue paint makes me wonder if this was a crate motor or a warranty replacement. I had read that all GM crate motors are black. I suppose it could've been repainted, but why blue.
Many thanks.
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1969 GMC K25 2007 Chevy 2500HD Classic Duramax 1999 Tahoe 2DR 4WD Base Model 5.7l |
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#8 |
Registered User
Join Date: Apr 2017
Location: Springtown, Texas
Posts: 19
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Re: Help Identify This Replacement SBC
Not a warranty engine. The suffix code would look different. There would be CE then 6? numbers.
That decodes as built in Flint, Oct. 30 and I would bet that the AJP is a late 1973 350-155hp 2 bolt main. Since it follows AJN. Gm used thousands of suffix codes in buses, boats, motorhomes, etc. It would not surprise me if there are still some unknown. Valve covers could be swapped. Check the casting number on the block and the date code if it is there by the oil filter housing. I would go as far as to pull a valve cover and check the numbers on the head as well. |
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#9 | |
Registered User
Join Date: Apr 2017
Location: Knoxville, Tennessee
Posts: 891
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Re: Help Identify This Replacement SBC
Quote:
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1969 GMC K25 2007 Chevy 2500HD Classic Duramax 1999 Tahoe 2DR 4WD Base Model 5.7l |
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#10 |
Registered User
Join Date: Apr 2017
Location: Springtown, Texas
Posts: 19
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Re: Help Identify This Replacement SBC
I would back up and punt it. It would be as much work and possibly $$ to do a head/cam swap than to R&R a better foundation. If you are going for more hp/tq.
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#11 |
Registered User
Join Date: Apr 2017
Location: Knoxville, Tennessee
Posts: 891
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Re: Help Identify This Replacement SBC
Yes, I was thinking of heads, cam, headers, and an intake. Keep it simple and mild. 350 ish HP, but maybe this isn't the block to work from.
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1969 GMC K25 2007 Chevy 2500HD Classic Duramax 1999 Tahoe 2DR 4WD Base Model 5.7l |
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#12 |
Registered User
![]() Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Help Identify This Replacement SBC
The most telling tail will be the head casting number , dont think I would put a top end kit on one of those old goodwrench motors , especially if it has dished pistons . Id opt for an l31 long block and go from there . But thats just me .
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68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive |
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#13 |
Senior Member
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Location: Sandown, NH
Posts: 2,819
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Re: Help Identify This Replacement SBC
I would run the engine & head casting numbers and see what they come up as !
Being blue it very well could be a 305 !
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Gary 72 SWB 4x4 My 72 SWB Build http://67-72chevytrucks.com/vboard/s...d.php?t=259859 |
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#14 |
Registered User
Join Date: Apr 2017
Location: Knoxville, Tennessee
Posts: 891
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Re: Help Identify This Replacement SBC
Hush your mouth!
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1969 GMC K25 2007 Chevy 2500HD Classic Duramax 1999 Tahoe 2DR 4WD Base Model 5.7l |
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#15 |
Registered User
Join Date: Apr 2017
Location: Knoxville, Tennessee
Posts: 891
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Re: Help Identify This Replacement SBC
I would note that all of the AJ_ motors are 350 ci.
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1969 GMC K25 2007 Chevy 2500HD Classic Duramax 1999 Tahoe 2DR 4WD Base Model 5.7l |
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#16 |
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Join Date: Oct 2009
Location: Tampa Bay
Posts: 1,549
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Re: Help Identify This Replacement SBC
AJP = 1985, Truck, 350ci, 160hp, manual trans, 2bbl, LF-5 RPO code, VIN code A, 60 series, federal and California emissions.
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CHEVY/GMC VIN DECODERS |
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#17 |
Registered User
Join Date: Apr 2017
Location: Knoxville, Tennessee
Posts: 891
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Re: Help Identify This Replacement SBC
Good information. I guess they slapped a 4bbl on it for the swap. Anyone known if the LF-5 RPO motor is 4-bolt?
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1969 GMC K25 2007 Chevy 2500HD Classic Duramax 1999 Tahoe 2DR 4WD Base Model 5.7l |
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#18 |
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Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Help Identify This Replacement SBC
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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