identifying block year

[blackdawg]

still having trouble identifying the exact year.it makes a differance ordering parts.

[blackdawg]

[blackdawg]

[blackdawg]

here is marking on the head

[1Bad62Pro/Street]

10066036 350 4 Crate Motor, 2 pcs. seal, Hecho En Mexico
Engine and Drivetrain>
Online engine resources (casting numbers, calculators, etc.) ->
http://67-72chevytrucks.com/vboard/s...d.php?t=382583
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[dwcsr]

10066036...350.Goodwrench crate motor, 2-piece rear seal
between 1976-1988

[blackdawg]

thanks for the information.thats a little more than i have been finding on the web.i"ve been getting all the way to 1994 .i guess there is no way to get the exact year the engine was produced.the reason i ask is to get parts one of queastions is it a two piece rear seal opposed to a one piece.i"m ordering the rebuild kit from nothern auto parts.the part person said there are different size oil rings on the piston.i"m in british columbia so i have to get them shipped and hop across to blaine washington to pick them up.kit in the states 106 buck kit here 300.

[raycow]

Your head appears to have a casting date, but the pic is too fuzzy for me to read it. Please post what it says on the head.

Ray

[blackdawg]

3998993 then has 319 and gm10

[raycow]

Sorry, that's probably a Julian date - so no help on the year. Those heads were originally used 72-73 and later on the crate engines forever.

Ray

[blackdawg]

k thanks

[Rich 5150 69]

Block is 320 day of `89 mexico block, they are weak in the main webbing area, already destroyed two myself, self destructed at 5,500..

[Captainfab]

If it's an '89 block, that would be a 1 piece rear main.

blackdawg.....Can we see a pic of the rear of the block where the crank sits?

[blackdawg]

here is the pic

[Captainfab]

Nope that's a 2 piece rear main.....

[blackdawg]

so that makes it a 1976-to 1988 block 4 bolt main 2 piece rear seal.

[Captainfab]

The last year for the 2 piece rear main seal in a production engine was 1985. I don't know if the Goodwrench engines kept the 2 piece longer or not.....it's possible.

Originally Posted by blackdawg

so that makes it a 1976-to 1988 block 4 bolt main 2 piece rear seal.