[jvillen1]

I did a thorough cleaning to find a number to identify my block better as I am still thinking it is a 1976 or 71. On the 4.5'' pad on the front I got a number c61173 853 k06 03 9k. And on the side in picture one I think it says (d f 1). In picture 2 on the left ledge at the back it says 3970010 K and the number 2 in a square. On the back behind the flywheel it says 939 and below 010. In picture 3 it shows 71 beside it driverside dipstick.

[jimfulco]

There should be a date code behind the right cylinder head. Same place as the casting number 3970010, but on the right side instead of the left.

[jvillen1]

I did check already and in the early 70's they went to the side of the block I just can't figure out the code. I am puting up another pic of the other side.

Originally Posted by jimfulco

There should be a date code behind the right cylinder head. Same place as the casting number 3970010, but on the right side instead of the left.

[Torque454]

Hi this is my first post. I found the date code and stuff on my 3970010 block on a flat spot in front of the cylinder head. There should be a small angled flat spot with writing stamped in it.

[jvillen1]

Yes, I did find that spot ( the pad) and it had the number:
c61173 853 k06 03 9k - which I couldn't cross reference any suffix codes or engine ids.

Originally Posted by Torque454

Hi this is my first post. I found the date code and stuff on my 3970010 block on a flat spot in front of the cylinder head. There should be a small angled flat spot with writing stamped in it.

[Torque454]

Originally Posted by jvillen1

Yes, I did find that spot ( the pad) and it had the number:
c61173 853 k06 03 9k - which I couldn't cross reference any suffix codes or engine ids.

I crossed it over on mine somehow but its been so long now that ive forgotten. I found something online that told you how to read it, thats all i remember.

[SSedan64]

c61173 May be a TargetMaster engine C=March, 6th, 117= Part#, 3=1973
http://www.nastyz28.com/chevy-engine-code-stampings.php

[Torque454]

Thats the site i found. Thanks SSedan! Just for the hell of it I looked up the date on the 305 i bought to run in my pickup until my 454 is done and it appears to be made November 7th 1980 (K0785000) if i am reading it correctly. However that was the only number on that pad, i expected more. What is this targetmaster engine you speak of? A GM replacement engine? Could that be why this 305 doesnt have any more numbers on it?

[jvillen1]

Thanks all of yeahs, I won't be satisfied till I find out for sure with a cross reference of some sort. I can't believe that nothing fits with all the numbers I have taken off of it... Does this target place go by any reference or did gm have specific logged blocks out of a different pocket that they kept track of, if so how would someone get a hold of it.

Originally Posted by Torque454

Thats the site i found. Thanks SSedan! Just for the hell of it I looked up the date on the 305 i bought to run in my pickup until my 454 is done and it appears to be made November 7th 1980 (K0785000) if i am reading it correctly. However that was the only number on that pad, i expected more. What is this targetmaster engine you speak of? A GM replacement engine? Could that be why this 305 doesnt have any more numbers on it?

[SSedan64]

Here's some Info on the TargetMaster engines.>>>>>>>>>>>>>>>>>
http://www.novas.net/forums/showthread.php?t=6041