[tt69camaro]

The numbers off my block are 18k180807 and t0220ed. I'm wondering what year and ci this block came from and out of what cars if possible.
Thanks, Chris

 

[Mike]

1 =Chevrolet
8 =1968
K = KANSAS CITY, MISSOURI (LEEDS)
they made Chevelle (1964-1972)
El Camino (1964-1972)
Monte Carlo (1971-1972)
GMC Sprint (1971-1972)
180807 = sequnntial production number - The sequential starting number for the 1968 Chevelle was 100001 at all U.S. Chevelle assembly plants.


ED 68 396 Chevelle 325 L-35 4-Spd 4-Brl

 

[bcmiller]

396/325 hp used with manual transmission from a 1968 Chevelle assembled in Kansas City.
Second number (8) in the partial VIN tells the year.
Third digit in the VIN (K) is the vehicle assembley plant.

See
http://www.chevellestuff.com/1968/engine_id_codes.htm
and
http://www.chevelles.com/years/68/68codes.html

 

[bcmiller]

WOW. I was too slow on that one.

 

[tt69camaro]

I thought it was a 375hp based on the heads? Any chance of that or are the heads and block a mismatch? Is it a 2-bolt, 4-bolt or can't you tell by those numbers?
Thanks for the info!

 

[Mike]

325hp 396's were 2 bolt.
Do you have the head casting numbers?

 

[bcmiller]

ED code would be a 2 bolt main block.
375 hp heads would have rectangle intake ports.

Most of the 396 blocks and heads will say HI PERF - so that does not mean 375 hp.

 

[tt69camaro]

Casting #'s are 3919840 date codes on heads are a-12-8 and a-10-8(january-12 and january 10-1968).

 

[bcmiller]

Those are the 396 / 375hp rectangle port heads. Not sure why they are on that engine. Have you had the pan off to see what crankshaft and rods are in the engine?

http://www.chevellestuff.com/qd/head_casting_by_year.htm

 

[tt69camaro]

I have not pulled the pan but was told there is a steel crank and pink rods? And it was a 4-bolt (maybe a conversion?)

 

[bcmiller]

If it is a steel crank, it would probably be a 6223 casting.

It may have dimple rods. "Pink" rods are high performance small block rods, not big block. I guess it is possible that it is a converted 4 bolt main. But that ED code is the 325 hp version and should be only a 2 bolt main block, unless for some reason they ran out of two bolt blocks that day and had a use a 4 bolt in its place. That is highly unlikely though.