LS-6 correct date heads

[Bigblockhappy]

My LS-6 chevelle is a late January 1970 built car,I'm gonna be getting heads for it.I need to establish what the correct dates should be for the heads; early January,December,November?

[Mr70]

Go with the Tonawanda build date stamped on the engine pad.That is when the engine was a running unit,and heads should not exceed this date.
Figure 6 to 8 weeks max before it,as an average,not always so though.
Nearest date you can find to your Tonawanda date,but not after,the better.

[Bigblockhappy]

Mr70,
Unfortunately, I don't have the original block for my car so I can't go by that. But 6-8 weeks back helps me though.
Nice L-78 you got,it's the same exact colour as mine.

[hvychev]

and almost everyone elses............ /ubbthreads/images/graemlins/grin.gif