Engine Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Car'n'Guitars · 08-01-2012, 06:50 PM

Okay so today I was looking under the hood of my truck and was wondering if the motor is original or not. Where can I find the casting numbers to check what motor I have? Also I was looking at the the distributor and noticed the vacuum line on it ran into the back of the carb which is a q-jet. Is this supposed to be this way? I was looking at the emissions diagram thing on the radiator support and it show that from the distributor it should split and go into 2 lines, but mine only goes to the back of the carb. And a couple of other things in the "tubing" are not correct according to the emissions tag. Could this be a indicator that the motor was changed in the truck?

77chevyinline6 · 08-01-2012, 07:54 PM

The casting numbers are usually on the side of the block (at least mine is)

geezer#99 · 08-01-2012, 08:05 PM

Casting number is behind the head on the drivers side.
There's also numbers on the pad at the front passenger side right in front of the head.
Part of the serial number, a build date and a 2 or 3 letter code is there to narrow down your engines original use.
Take a pic of your carb where the vac line goes.

Car'n'Guitars · 08-01-2012, 08:07 PM

Quote:

Originally Posted by geezer#99

Casting number is behind the head on the drivers side.
There's also numbers on the pad at the front passenger side right in front of the head.
Part of the serial number, a build date and a 2 or 3 letter code is there to narrow down your engines original use.
Take a pic of your carb where the vac line goes.

Okay thanks I'll get a picture tomorrow. These hoses are really bad,most are cut or lead to nothing.

08-01-2012, 06:50 PM	#1
Car'n'Guitars Registered User Join Date: Dec 2011 Location: Elkhart, IN Posts: 1,308	Engine Help Okay so today I was looking under the hood of my truck and was wondering if the motor is original or not. Where can I find the casting numbers to check what motor I have? Also I was looking at the the distributor and noticed the vacuum line on it ran into the back of the carb which is a q-jet. Is this supposed to be this way? I was looking at the emissions diagram thing on the radiator support and it show that from the distributor it should split and go into 2 lines, but mine only goes to the back of the carb. And a couple of other things in the "tubing" are not correct according to the emissions tag. Could this be a indicator that the motor was changed in the truck? __________________ 1985 Chevrolet K10 Custom Deluxe---SOLD 1997 Ram 2500 5.9 Cummins 1985 Chevrolet Camaro Z28 1987 Chevrolet K10 Silverado "The Beast" build 1987 Silverado http://67-72chevytrucks.com/vboard/s...=1#post6150257

08-01-2012, 07:54 PM	#2
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Engine Help The casting numbers are usually on the side of the block (at least mine is) __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

08-01-2012, 08:05 PM	#3
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,731	Re: Engine Help Casting number is behind the head on the drivers side. There's also numbers on the pad at the front passenger side right in front of the head. Part of the serial number, a build date and a 2 or 3 letter code is there to narrow down your engines original use. Take a pic of your carb where the vac line goes.

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