Identify my motor
Thread Starter
Pro
Joined: Oct 2000
Posts: 564
Likes: 0
From: Riverview Florida
Identify my motor
Still trying to figure out what I have. Motor claimed to be an "almost new crate motor" when I bought the car. Clean, shiny black block, iron heads with center bolt valve covers. Can't find any company stickers on motor. Cast numbers I can find are on the rear area of the block just in front of the bellhousing; On the left there is - GM 5.7L C
SMCO
on an angle under this is - a dot, then E242, then 2 dots
Above all of this near the centerline is a symbol of 12 dots around a circle
On the right is a number - 0243880 with some sort of symbol at each end.
can't find any numbers on heads so far. Where should I look? the only thing I noticed about the heads is that the plugs go straight in, not on an angle like on the L98 in my '88
SMCO
on an angle under this is - a dot, then E242, then 2 dots
Above all of this near the centerline is a symbol of 12 dots around a circle
On the right is a number - 0243880 with some sort of symbol at each end.
can't find any numbers on heads so far. Where should I look? the only thing I noticed about the heads is that the plugs go straight in, not on an angle like on the L98 in my '88
Racer
Joined: Oct 2004
Posts: 379
Likes: 0
From: Thief River Falls Minnesota
10243880...350...95-00...2 or 4...Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal
Not sure if this is what you have, if the symbol in front of it is a 1 that's what I'd guess though
Search on Mortec if it's not a 1 in front of it 
Not sure if this is what you have, if the symbol in front of it is a 1 that's what I'd guess though
Search on Mortec if it's not a 1 in front of it
Pro
Joined: Feb 2001
Posts: 558
Likes: 0
From: Dallas TX
Originally Posted by es
can't find any numbers on heads so far. Where should I look? the only thing I noticed about the heads is that the plugs go straight in, not on an angle like on the L98 in my '88
Thread Starter
Pro
Joined: Oct 2000
Posts: 564
Likes: 0
From: Riverview Florida
Thanks for the help. It got me pointed in the right direction. I will try to get a closer look at the first digit. It does look like a 1 that got a little sloppy during casting. Any other info will be appreciated.
Last edited by es; Dec 4, 2005 at 09:38 AM.
Safety Car
Joined: Oct 2005
Posts: 3,570
Likes: 1
From: Algonac Michigan
Motor I.D.
I tried the link to Mortec and I still can't determine what my motor was designed for. Can anyone help? I know all these numbers look a little strange to me also. T4A505610 followed by V127OTMM. I'm quite confused. By the way I do know that it is a small block, the data plate says that the car, a '69 vert, was built with a 350/350 And I was told by the previous owner that it now has a 327. I got all the numbers off of the pad on the r/f. of the block where it meets the head.
Last edited by sly vette; Dec 6, 2005 at 01:01 PM.
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