'70 CST/10 Dead Engine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jakes-66-K10 · 08-18-2004, 09:42 PM

Hi everyone, I'm new to the forums and need some help. I just picked up a CST/20 with a stock 350 engine. I scored one sweet deal of a truck, it has very little rust although some in the usual places like rocker panels, lower rear of the cab etc. Someone rubber undercoated alot of panels, which really seems to have helped.

So, first question: Did these CST trucks come from the factory equipped for campers? I hear it stands for Custom Sport Truck, but not sure what this really means to make it different from a C20. This had a second battery which was wired to a connector in the drivers side of the bed for the camper. It also has 3 gas tanks, a geared loading mechanism on the bed in place of a tailgate, and all kinds of wiring that I'm not sure if this was done stock or from the original owner.

Next question would be the engine. I bought this for such a great price because it wouldn't start. Well, after trying various things and noticing some problems, I have found out it has thrown a rod, and punctured the oilpan. So, I'm trying to weigh my options here. I could put in a 350 I have from another truck, rebuild this one (if possible) or part out the engine since it is original.

Any suggestions to get this beast driving again?

Thanks,

Jake

68C15 · 08-18-2004, 10:14 PM

welcome from SD. where are you from?
I dont know much about the options affair, I'm sure someone here will have some info on that. as for the engine, put the other 350 in it. with a rod out the pan I feel the cost to repair will be quite extensive. you would need a crank, set of rods, pistons, rings, brgs., gaskets etc.... not to mention the machine shop bill.
by all means, DO NOT PART IT OUT. sounds like you have an interesting peice of history there. it needs to be on the road.
JMO, Todd

Longhorn Man · 08-18-2004, 10:35 PM

Welcome to the forum.
I may know where the confusiopn lays on the 10/20 deal.
Up to 1970, all 1/2 ton trucks had 6 lug wheels. Then in 71, when the disk brakes showed up, they went to 5 lug. The 3/4 ton was 8 lug back then, and just recently did they start 6 lug 3/4 ton trucks.
The CST does in fact stand for Custom Sport Truck, it was the top of the line option package, but in reality, it is mostly bright trim and nice scroll work in the vinyl. CST's while not being so much rare, but hard to come across. Seems most were strip down trucks untill 71 when the Cheyenne hit the market, after that, seems they were all loaded with lots of options.

Tx Firefighter · 08-18-2004, 11:10 PM

You can't beat a new 350 Goodwrench crate engine for price (1200 bucks complete), quality (it's 100% brand new) or warranty (3 yr 50k miles).

jlmtrout · 08-19-2004, 12:48 AM

Welcome from Memphis, Tn. I agree with 68c15. Keep it on the road and put another engine in it. Good luck and keep on truckin'..............Jerry

**Canadian694x4** · 08-19-2004, 01:00 AM

Welcome To The Board!

Jakes-66-K10 · 08-19-2004, 03:33 PM

No, I meant parting out the engine. The truck is definitely going to stay on the road. I was thinking of putting a new crate or rebuilt 350 back into it and selling parts from the blown engine. Think there is demand for original engine parts? Someone I know already has dibs on the manifolds...

You guys will be jealous because I bought this for $200. I'll have to take some pictures.

Ozark Tim · 08-19-2004, 05:03 PM

I will interject my opinion here. I like em stock. So even though the motor may be scrap, all the components on it may still be fine. I did a similar job on a nice 72 of mine, and I bought a crate 350 from Chevrolet. I then deeply cleaned, and repainted all the original manifolds, valve covers dampener pulleys, air cleaner etc. Other than the #'s on the motor it looks like the original, and thats how I prefer them to be.

Jakes-66-K10 · 08-27-2004, 11:23 AM

OK, I need to snap some pictures I'll try to get them up soon, but my truck does in fact say on it CST/20 underneath that it has the 8:350 emblem. Is this a rare truck? I can't even find any replacement emblems that say CST/20 only CST/10

Robert1970C20rstbukt · 08-27-2004, 05:11 PM

They aren't re-popping the CST/20 or CST/30? emblems. I have seen the C/10's and CST/10's availible from almost every 67-72 parts vendors. It's just like the old C/20 emblems, they're hard to find in good shape. I think those were only on 69 through early 70 trucks. Mine was made in early 1970 and it has the older C/20 emblems with the 8-350 sitting right under it. I bought a C/20 emblem off eBay a couple months ago for only a buck!

inline6Bill · 08-27-2004, 09:48 PM

CST/20s are quite rare; I owned a '69 for quite a while (20 years).

As for the engine: Goodwrench 350 swap. Only problem with them is mounting power steering pump (was on my '69), but with a little ingenuity, it worked.

Take a look on the glove box door, there should be a decal telling you what options the truck has. Also look behind the seat for the build sheet, could be in the springs in the seatback.

Good luck with your fantastic new purchase !! $200 for a great pickup is a complete steal !!!

donkey69 · 08-27-2004, 09:55 PM

Welcome from MN!

.....as far as keeping it on the road, I would throw the running 350 in for now-then save up some $$ for later!

krue · 08-28-2004, 10:41 AM

Welcome to the board from South Mississippi. I don't know of a lot of demand for sb parts. As far as rarity, as far as I can tell it doesn't really affect the value very much.

**Palf70Step** · 08-28-2004, 06:34 PM

Welcome to the board from south Mississippi (again). Glad to have you on board and sounds like you got a unique truck there.

Jakes-66-K10 · 09-02-2004, 09:49 AM

Thanks for the welcome and the information guys! I threw some pictures of this truck up: http://67-72chevytrucks.com/vboard/s....php3?t=118139

71Longbed · 09-02-2004, 06:13 PM

whoever sold you that for 200 got robbed

FRENCHBLUE72 · 09-02-2004, 08:00 PM

Welcome to the board fom southern oregon and good luck on your new project..

08-18-2004, 09:42 PM	#1
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	'70 CST/20 Dead Engine Hi everyone, I'm new to the forums and need some help. I just picked up a CST/20 with a stock 350 engine. I scored one sweet deal of a truck, it has very little rust although some in the usual places like rocker panels, lower rear of the cab etc. Someone rubber undercoated alot of panels, which really seems to have helped. So, first question: Did these CST trucks come from the factory equipped for campers? I hear it stands for Custom Sport Truck, but not sure what this really means to make it different from a C20. This had a second battery which was wired to a connector in the drivers side of the bed for the camper. It also has 3 gas tanks, a geared loading mechanism on the bed in place of a tailgate, and all kinds of wiring that I'm not sure if this was done stock or from the original owner. Next question would be the engine. I bought this for such a great price because it wouldn't start. Well, after trying various things and noticing some problems, I have found out it has thrown a rod, and punctured the oilpan. So, I'm trying to weigh my options here. I could put in a 350 I have from another truck, rebuild this one (if possible) or part out the engine since it is original. Any suggestions to get this beast driving again? Thanks, Jake Last edited by Jakes-66-K10; 08-27-2004 at 11:30 AM.

08-18-2004, 10:14 PM	#2
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	welcome from SD. where are you from? I dont know much about the options affair, I'm sure someone here will have some info on that. as for the engine, put the other 350 in it. with a rod out the pan I feel the cost to repair will be quite extensive. you would need a crank, set of rods, pistons, rings, brgs., gaskets etc.... not to mention the machine shop bill. by all means, DO NOT PART IT OUT. sounds like you have an interesting peice of history there. it needs to be on the road. JMO, Todd __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

08-18-2004, 11:10 PM	#4
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	You can't beat a new 350 Goodwrench crate engine for price (1200 bucks complete), quality (it's 100% brand new) or warranty (3 yr 50k miles). __________________ I'm on the Instagram- @Gearhead_Kevin

08-19-2004, 12:48 AM	#5
jlmtrout Registered User Join Date: Jul 2002 Location: Memphis, Tn Posts: 194	Welcome from Memphis, Tn. I agree with 68c15. Keep it on the road and put another engine in it. Good luck and keep on truckin'..............Jerry __________________ '68 c-10 long wheelbase fleetside, been in family since new, originally 250 3 speed Now (389) 350 .060 over 3.75 stroke,Edelbrock Performer RPM 70cc heads and Intake 600 cfm Edelbrock,Small Comp Cams retro-roller cam and roller rockers,9:1 cr, headers, HEI,Old Air a/c, 72 power disc brakes w/stainless lines, 3.42 gear,T-56 6-speed, original paint(what's left of it). Dakota Digital Dash

08-19-2004, 01:00 AM	#6
Canadian694x4 Born To Lose Club Join Date: Feb 2003 Location: Calgary, Alberta/Oxenden, Ontario, Great White North Posts: 13,307	Welcome To The Board! __________________ Brian Smith - "Born To Lose" 1969 Chevrolet K10 LWB Fleetside - Proud Owner For 22 Yrs - 1 of 208 Built & Sold In Canada!- 283 V8/350TH/NP208, 2" All Spring Lift, 32" Good Year MT/R's. 1972 GMC K2500 Custom LWB Fleetside - Proud Owner For 3 Yrs - 1 of 571 Built & Sold In Canada! - 350 V8/SM465/NP205, 4” Rough Country Lift, 33” Interco TSL Thornbirds 2007.5 GMC Sierra SLE 2500HD 4x4 - Proud Owner For 17 Yrs- 6.6L V8 Duramax Diesel/Allison 1000, 2" Lift, 33" Mickey Thompson MTZ's. 2008 Yamaha Raptor 700r - Proud Owner For 15 Yrs - ITP Mud Lites. 2015 John Deere 1025R - Proud Owner For 8 Yrs - 24HP Diesel/H120/54D/260B/SB1154.

08-18-2004, 10:35 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Welcome to the forum. I may know where the confusiopn lays on the 10/20 deal. Up to 1970, all 1/2 ton trucks had 6 lug wheels. Then in 71, when the disk brakes showed up, they went to 5 lug. The 3/4 ton was 8 lug back then, and just recently did they start 6 lug 3/4 ton trucks. The CST does in fact stand for Custom Sport Truck, it was the top of the line option package, but in reality, it is mostly bright trim and nice scroll work in the vinyl. CST's while not being so much rare, but hard to come across. Seems most were strip down trucks untill 71 when the Cheyenne hit the market, after that, seems they were all loaded with lots of options.

08-19-2004, 03:33 PM	#7
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	The engine No, I meant parting out the engine. The truck is definitely going to stay on the road. I was thinking of putting a new crate or rebuilt 350 back into it and selling parts from the blown engine. Think there is demand for original engine parts? Someone I know already has dibs on the manifolds... You guys will be jealous because I bought this for $200. I'll have to take some pictures.

08-19-2004, 05:03 PM	#8
Ozark Tim Registered User Join Date: Aug 2004 Location: Oakville, MO Posts: 1,018	Opinoinated I will interject my opinion here. I like em stock. So even though the motor may be scrap, all the components on it may still be fine. I did a similar job on a nice 72 of mine, and I bought a crate 350 from Chevrolet. I then deeply cleaned, and repainted all the original manifolds, valve covers dampener pulleys, air cleaner etc. Other than the #'s on the motor it looks like the original, and thats how I prefer them to be.

08-27-2004, 11:23 AM	#9
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	OK, I need to snap some pictures I'll try to get them up soon, but my truck does in fact say on it CST/20 underneath that it has the 8:350 emblem. Is this a rare truck? I can't even find any replacement emblems that say CST/20 only CST/10

08-27-2004, 05:11 PM	#10
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	They aren't re-popping the CST/20 or CST/30? emblems. I have seen the C/10's and CST/10's availible from almost every 67-72 parts vendors. It's just like the old C/20 emblems, they're hard to find in good shape. I think those were only on 69 through early 70 trucks. Mine was made in early 1970 and it has the older C/20 emblems with the 8-350 sitting right under it. I bought a C/20 emblem off eBay a couple months ago for only a buck! __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck

08-27-2004, 09:48 PM	#11
inline6Bill A classic GM kinda guy Join Date: Mar 2004 Location: Phoenix, Arizona Posts: 296	Welcome Aboard !!! CST/20s are quite rare; I owned a '69 for quite a while (20 years). As for the engine: Goodwrench 350 swap. Only problem with them is mounting power steering pump (was on my '69), but with a little ingenuity, it worked. Take a look on the glove box door, there should be a decal telling you what options the truck has. Also look behind the seat for the build sheet, could be in the springs in the seatback. Good luck with your fantastic new purchase !! $200 for a great pickup is a complete steal !!! __________________ Old school rap music: a dual exhausted GM 6 with no mufflers. "If you can find a better vehicle, buy it" Lee Iacocca, Chrysler commercials of the '80s. "I did. They are called Classic GM pickups !!!"

08-27-2004, 09:55 PM	#12
donkey69 JB-80 &quot;Twice as Good&quot; Join Date: Jun 2004 Location: Central, MN Posts: 354	Welcome from MN! .....as far as keeping it on the road, I would throw the running 350 in for now-then save up some $$ for later! __________________ HEY NOW!

08-28-2004, 10:41 AM	#13
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Welcome to the board from South Mississippi. I don't know of a lot of demand for sb parts. As far as rarity, as far as I can tell it doesn't really affect the value very much. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

08-28-2004, 06:34 PM	#14
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,468	Welcome to the board from south Mississippi (again). Glad to have you on board and sounds like you got a unique truck there. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

09-02-2004, 09:49 AM	#15
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	Thanks for the welcome and the information guys! I threw some pictures of this truck up: http://67-72chevytrucks.com/vboard/s....php3?t=118139



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09-02-2004, 06:13 PM	#16
71Longbed Not Mine But A beauty Join Date: Aug 2004 Location: Southern CaL Posts: 368	whoever sold you that for 200 got robbed

09-02-2004, 08:00 PM	#17
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	Welcome to the board fom southern oregon and good luck on your new project.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

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