My recollection is that the 68 340 with 4 speed had the the highest output of the 4bbl engines. Automatic had a slightly milder cam as did all 69's and up. Does that ring true with anyone else? I had a 69 Cuda FB with 340, 4 spd, manual everything and 4:10 rear and it was pretty quick. Maybe the Wednesday cars were closer to 325 and the Monday/Friday cars were closer to 275?[/QUOTE
Thats true that the 68 4 speed motor had a slightly more agressive cam than the automatic cars and after the 68 model year was over, they went to the automatic grind for all regular production 340's.
I don't know about the Wed/Fri battle, but I wouldn't doubt it. I worked at an auto parts manufacturing plant back in my younger years and the place was a ghost town on Friday, and whoever actually came back had been out drinking and smoking their lunch!!! Yep, me too!!!
Geof