Hi everyone, New member here. Ive also posted this in the 'L78 unrestored pace car' forum since it looks like that car has the same '11N' issue as mine and this hugger orange DZ.
I have a similar issue as this car that might help me. I have a 69 396 4speed pace car. Ive tracked it back to 1978.
I, too have the'11N' date code on the engine, specifically 11N 625385. My block has also been decked way long ago. When I got the car in 2001, I had the engine cleaned up and it was found to be 60 over already and had recently had an engine rebuild…The shop told me similar to the other stories on here..blocks in the 80s were always decked. My casting date is C 20 9, heads are C21 9 and C24 9, and my car is an 03E car…all line up quite well.
What I am trying to learn is does anyone know why the block would have had a stamping of '11N'? Im the third one to have that it seems. My car seems to have a complete matching driveline. Id love to hear from anyone who can help with the credibility of a '11N' stamping.