Block Identification
Thread Starter
Racer
Joined: Oct 2006
Posts: 412
Likes: 1
From: St. John's Newfoundland
Block Identification
Hi Guys.
Could someone Identify my block. It's a four bolt that I am getting machined for a 383 build. I would just like to know a few things about it.
Cast Numbers located on the back:: 3970010 86
HECHO EN MEXICO
Serial Number stamped in the front:: MC14800
What's it from?
General year produced??
2 piece or 1 piece rear main seal??
Thanks in advance
Clyde
Could someone Identify my block. It's a four bolt that I am getting machined for a 383 build. I would just like to know a few things about it.
Cast Numbers located on the back:: 3970010 86
HECHO EN MEXICO
Serial Number stamped in the front:: MC14800
What's it from?
General year produced??
2 piece or 1 piece rear main seal??
Thanks in advance
Clyde
Melting Slicks
Joined: Feb 2001
Posts: 3,330
Likes: 13
From: Europe , Luxembourg
Hi
3970010 has been used in Corvettes as from 1970 till 1980 for the 350 CI
block in 2 and 4 bolt applications.
So should be a 2 piece rear seal.
The MC S/N is not from a Vette. Sorry, don't know anymore.
Check here http://www.mortec.com/castnum.htm for more info.
Casting CI year mains apllication
3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4
Rgds. Günther
3970010 has been used in Corvettes as from 1970 till 1980 for the 350 CI
block in 2 and 4 bolt applications.
So should be a 2 piece rear seal.
The MC S/N is not from a Vette. Sorry, don't know anymore.
Check here http://www.mortec.com/castnum.htm for more info.
Casting CI year mains apllication
3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4
Rgds. Günther
Thread Starter
Racer
Joined: Oct 2006
Posts: 412
Likes: 1
From: St. John's Newfoundland
Hi
3970010 has been used in Corvettes as from 1970 till 1980 for the 350 CI
block in 2 and 4 bolt applications.
So should be a 2 piece rear seal.
The MC S/N is not from a Vette. Sorry, don't know anymore.
Check here http://www.mortec.com/castnum.htm for more info.
Casting CI year mains apllication
3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4
Rgds. Günther
3970010 has been used in Corvettes as from 1970 till 1980 for the 350 CI
block in 2 and 4 bolt applications.
So should be a 2 piece rear seal.
The MC S/N is not from a Vette. Sorry, don't know anymore.
Check here http://www.mortec.com/castnum.htm for more info.
Casting CI year mains apllication
3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4
Rgds. Günther
Thanks Gunther
Clyde
Drifting
Joined: Sep 2006
Posts: 1,259
Likes: 2
From: MS
This is a 350 cu in Goodwrench or Targetmaster GM replacement engine.
No Corvette blocks of that era were cast in Mexico.
Look on the back bellhousing flange for a date code, a letter and then 3 or 4 numbers.
The 010 block will be a 2-piece rear main seal, 1-piece started in 86.
Tell your machinist to grind off the "Hecho in Mexico" and nobody will know what it was.
No Corvette blocks of that era were cast in Mexico.
Look on the back bellhousing flange for a date code, a letter and then 3 or 4 numbers.
The 010 block will be a 2-piece rear main seal, 1-piece started in 86.
Tell your machinist to grind off the "Hecho in Mexico" and nobody will know what it was.
