C40 engine? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

crazyredneck · 11-21-2009, 06:21 PM

i have a shot at getting a big block out of a c40 for 300 bucks

does anyone know what size it might be its in a 67-68 because it has the small back window so it cant be a 454 right? and did they have the 366 that far back or would it be a 427?

haysonj · 11-21-2009, 06:32 PM

Quote:

Originally Posted by crazyredneck

i have a shot at getting a big block out of a c40 for 300 bucks

does anyone know what size it might be its in a 67-68 because it has the small back window so it cant be a 454 right? and did they have the 366 that far back or would it be a 427?

Most likely a 366 and not a real good motor. It was a truck motor but not good for performance.I had one in my 66 C50

Tx Firefighter · 11-21-2009, 09:27 PM

I agree, likely a 366, which is a tall deck engine with little bores.

The small back window thing doesn't mean anything on big trucks either. They used small windows way up into the 80s on heavies.

crazyredneck · 11-22-2009, 12:02 AM

alrighty thanks guys ill get some casting numbers off the block next time i go back

jeffspower · 11-22-2009, 12:41 AM

I don't think a 427 was offered in the C40, maybe not even the C50. I think you had to step up to a C60.

But I could be wrong, it wouldn't be the first time

crazyredneck · 11-22-2009, 01:34 AM

yea im just gettin my hopes up its prolly a 366

Longhorn Man · 11-23-2009, 01:32 AM

unless its a 427, i wouldn't even bother

69GMCLonghorn · 11-23-2009, 01:45 PM

I've heard the 427 truck engines are really torquey (?) motors. In terms of overall performance, are they worth using? Or would someone be better off with just a good ol' 396 or 454?

turp mcspray · 11-23-2009, 02:40 PM

Even if it's a 427, it's probably a tall deck block. Find yourself a 454.

dwcsr · 11-23-2009, 03:44 PM

The 67 C40 6 wheel dump I drove had a 348. My 70 Box truck had a small block. Depends on what body it had. On or off road and GVW

Longhorn Man · 11-23-2009, 06:13 PM

348 wouldn't have been original if I'm not mistaken.
The 427 would indeed be a tall deck... but the steel crank is worth a couple bucks, and then there's some people wou atill think a 40 year old block is a good idea for a 500+ cube 'mountain motor'.
I wouldn't use it if it was ready to stab in my truck. I'd use it to make money then grab a big block that is worthey.

dwcsr · 11-23-2009, 07:44 PM

Quote:

Originally Posted by Longhorn Man

348 wouldn't have been original if I'm not mistaken.
.

As I remember now it was a 60 or 61 truck. 67 is 366 or 327

**tkeduk8r** · 11-23-2009, 08:09 PM

From what I have been reading a 366 and 427 Truck motors are just that Great truck motors... I am seriously thinkng about a 427 in my 3x4 4x4 build i am planning. It will never see the far side of 4500 Rpm and rock solid internals... remember these things hauled huge amoutns of weight over the road for many years... i will probably do a close to stock rebuild and drive the he** out of it... depends on what you want, if you went 366 you could prolly score a nice running engine for 50-100 dollars cuz no one wants them... throw it under your hood and brag up as a big block

.... JMO
--Mike

jeffspower · 11-23-2009, 09:54 PM

At 4:37, our tall deck that isn't "worthy" comes on the track for a 8,600 rpm 1st place run. Nothing very trick about it, it still has iron heads and steel rods. Over 40 hooks on it this year with nothing more than an oil change and 2 valve adjustments.

YouTube- Oneida, KS Truck Pull: 5,800 lb Modified...

Longhorn Man · 11-23-2009, 10:15 PM

OK... they can be built up... how much do you have in it if I may ask?

jeffspower · 11-23-2009, 10:42 PM

My ownership consists of sweat equity, a 1 ton frame I had, and about $300 I spent on doors and a hood scoop

It's kind of tough to say what my partner has in the engine dollar wise. It came with a truck he traded another truck for. The engine was built by a reputable shop 2 years ago, and came with the parts specs. Carb to pan would have to be at least 15K based on that. Looking at it that way, a tall deck isn't a good choice for an affordable street engine.

I don't have 2,500 in the engines of my 3 trucks combined. CSOB club member here for sure

unclewatts · 11-24-2009, 10:57 PM

I like the exhaust pipes on those trucks. I think I'll do that to mine!

Longhorn Man · 11-24-2009, 11:51 PM

you can get 1500 horses out of a quad 4, but it isn't cost effective.

11-21-2009, 06:21 PM	#1
crazyredneck Registered User Join Date: Jun 2008 Location: bucks co. PA Posts: 55	C40 engine? i have a shot at getting a big block out of a c40 for 300 bucks does anyone know what size it might be its in a 67-68 because it has the small back window so it cant be a 454 right? and did they have the 366 that far back or would it be a 427?

11-21-2009, 09:27 PM	#3
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: C40 engine? I agree, likely a 366, which is a tall deck engine with little bores. The small back window thing doesn't mean anything on big trucks either. They used small windows way up into the 80s on heavies. __________________ I'm on the Instagram- @Gearhead_Kevin

11-22-2009, 12:02 AM	#4
crazyredneck Registered User Join Date: Jun 2008 Location: bucks co. PA Posts: 55	Re: C40 engine? alrighty thanks guys ill get some casting numbers off the block next time i go back

11-22-2009, 12:41 AM	#5
jeffspower Well, Whoop-dee-do! Join Date: Mar 2003 Location: Easton, Mo. pop.- me & scarcely a few others Posts: 2,302	Re: C40 engine? I don't think a 427 was offered in the C40, maybe not even the C50. I think you had to step up to a C60. But I could be wrong, it wouldn't be the first time __________________ '68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car

11-22-2009, 01:34 AM	#6
crazyredneck Registered User Join Date: Jun 2008 Location: bucks co. PA Posts: 55	Re: C40 engine? yea im just gettin my hopes up its prolly a 366

11-23-2009, 01:32 AM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: C40 engine? unless its a 427, i wouldn't even bother

11-23-2009, 01:45 PM	#8
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: C40 engine? I've heard the 427 truck engines are really torquey (?) motors. In terms of overall performance, are they worth using? Or would someone be better off with just a good ol' 396 or 454?

11-23-2009, 02:40 PM	#9
turp mcspray Registered User Join Date: May 2007 Location: Rapid City South Dakota Posts: 2,359	Re: C40 engine? Even if it's a 427, it's probably a tall deck block. Find yourself a 454. __________________ Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299

11-23-2009, 03:44 PM	#10
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,134	Re: C40 engine? The 67 C40 6 wheel dump I drove had a 348. My 70 Box truck had a small block. Depends on what body it had. On or off road and GVW

11-23-2009, 06:13 PM	#11
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: C40 engine? 348 wouldn't have been original if I'm not mistaken. The 427 would indeed be a tall deck... but the steel crank is worth a couple bucks, and then there's some people wou atill think a 40 year old block is a good idea for a 500+ cube 'mountain motor'. I wouldn't use it if it was ready to stab in my truck. I'd use it to make money then grab a big block that is worthey.

11-23-2009, 08:09 PM	#13
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	Re: C40 engine? From what I have been reading a 366 and 427 Truck motors are just that Great truck motors... I am seriously thinkng about a 427 in my 3x4 4x4 build i am planning. It will never see the far side of 4500 Rpm and rock solid internals... remember these things hauled huge amoutns of weight over the road for many years... i will probably do a close to stock rebuild and drive the he** out of it... depends on what you want, if you went 366 you could prolly score a nice running engine for 50-100 dollars cuz no one wants them... throw it under your hood and brag up as a big block .... JMO --Mike __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's

11-23-2009, 10:15 PM	#15
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: C40 engine? OK... they can be built up... how much do you have in it if I may ask?

11-23-2009, 10:42 PM	#16
jeffspower Well, Whoop-dee-do! Join Date: Mar 2003 Location: Easton, Mo. pop.- me & scarcely a few others Posts: 2,302	Re: C40 engine? My ownership consists of sweat equity, a 1 ton frame I had, and about $300 I spent on doors and a hood scoop It's kind of tough to say what my partner has in the engine dollar wise. It came with a truck he traded another truck for. The engine was built by a reputable shop 2 years ago, and came with the parts specs. Carb to pan would have to be at least 15K based on that. Looking at it that way, a tall deck isn't a good choice for an affordable street engine. I don't have 2,500 in the engines of my 3 trucks combined. CSOB club member here for sure __________________ '68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car

11-24-2009, 10:57 PM	#17
unclewatts 70 Chevrolet=Obsession Join Date: Jun 2009 Location: nice ca Posts: 1,067	Re: C40 engine? I like the exhaust pipes on those trucks. I think I'll do that to mine! __________________ I'm Just like my truck. Old, Ugly and Grouchy. Except my truck starts easily in the morning and doesn't smoke! IT'S NOT EASY BEING GREEN! -Kermit the frog 1970 Chevrolet C-10 Longbed Stepside : 350, Muncie M20, 3.08 GM corp. positraction Forest green exterior/light green interior(Where all my money goes) 1996 Toyota Corolla (Parts runner)

11-24-2009, 11:51 PM	#18
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: C40 engine? you can get 1500 horses out of a quad 4, but it isn't cost effective.



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