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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: BigHemi353 on March 28, 2009, 02:49:19 pm

Title: Trying to identify my Motor
Post by: BigHemi353 on March 28, 2009, 02:49:19 pm: I've looked all over and cant seem to find my block casting number anywhere? It is GM395509. Seems like it switches to 7 numbers after that. I'm planning on buying an overhaul kit for it this week but I need to know what block I have first. Seems like PO's have put other heads on the truck as well. Thanks, Andy
Title: Re: Trying to identify my Motor
Post by: BigHemi353 on March 28, 2009, 04:17:06 pm: (http://i193.photobucket.com/albums/z177/Bighemi353/photodumpjoshuaandystruckruckusf-1.jpg)
not sure if it helps any but here is a pic of it. Looks like another small block to me(i restore small Briggs and Stratton and antique Farmall Tractor motors mainly). This is my first small block to rebuild. Ive read some places that the 395509 could be a 400. I was told it was a 350 from PO. Thanks guys, Andy
Title: Re: Trying to identify my Motor
Post by: eventhorizon66 on March 28, 2009, 05:00:49 pm: I think you'd need to pull a head off anyways to make sure that the block hasn't already been overbored, before you could order a rebuild kit. Once you do that you'll know what you got.
Title: Re: Trying to identify my Motor
Post by: Blue 82 on March 28, 2009, 07:32:42 pm: if it's a 3951509 it's a 400
Title: Re: Trying to identify my Motor
Post by: Irish_Alley on March 28, 2009, 11:05:28 pm: don't know if it helps ya but it looks like a sbc ;)
Title: Re: Trying to identify my Motor
Post by: oldwhity on March 29, 2009, 09:45:22 am: I've printed out casting numbers for blocks, rears, intakes, you name it and can't find it anywhere. I even found a website where you type in the number and it spits everything out for you. These numbers are from the drivers side behind the head right? Do you know if it's a crate motor? It looks like a newer alt. Double check the numbers and i'll help if I can.
Title: Re: Trying to identify my Motor
Post by: Blazin on March 29, 2009, 02:15:37 pm: I call a dealer when I want to know what a motor is. They always want the number on the right hand front of the block just in front of the head, on the deck surface.
Title: Re: Trying to identify my Motor
Post by: zieg85 on March 29, 2009, 05:48:34 pm: http://www.nastyz28.com/chevy-engine-code-stampings.php usually works for me
Title: Re: Trying to identify my Motor
Post by: oldwhity on March 29, 2009, 08:39:48 pm: Most of what I have is from nastyz28 and mortec. It ain't there.

Hey Big, do you have the suffix and or prefix codes off the engine boss in front of the pass side head where Blazin described?
Title: Re: Trying to identify my Motor
Post by: BigHemi353 on March 30, 2009, 06:06:54 pm: I'll see if i can find some more numbers on it tonight. got to take off a couple brackets. thanks guys

Andy
Title: Re: Trying to identify my Motor
Post by: BigHemi353 on March 30, 2009, 09:29:13 pm: Quote from: oldwhity on March 29, 2009, 08:39:48 pm
Most of what I have is from nastyz28 and mortec. It ain't there.

Hey Big, do you have the suffix and or prefix codes off the engine boss in front of the pass side head where Blazin described?

I took of the alternator, saw nothing there. might be hidden by grease. i'll take some carb cleaner to it when its daylight out. got to take a day off working on the truck....dad birthday ;)

Andy
Title: Re: Trying to identify my Motor
Post by: Blazin on March 30, 2009, 10:31:16 pm: If the block has ever been decked it will be gone.
Title: Re: Trying to identify my Motor
Post by: Captkaos on March 31, 2009, 02:43:32 pm: If it says GMXXX it is a crate motor.
Title: Re: Trying to identify my Motor
Post by: oldwhity on March 31, 2009, 07:59:51 pm: Capt, since you mentioned it, would a crate motor still have a casting number behind the drivers side head?