Tom....I can agree with that. I just never seen a 1969 L34 seat sheet. I wonder why Fisher body would have a reason to differentiate a L48, L34 and L78 as they were putting a Body and Interior together. I know their role had something to do with the heater box installation which may explain needing to know if the car being built will be a BB, Dual exhaust taping plates, But I would think N10 would cover that even on a L65 ordered with dual exhaust. I always thought Chevrolet took care of the Sub Frame and engine stands. Another item of interest is the ZL3 SS conversion. If the car has the L48, L34 and L78 would that not tell Fisher body the car will be an SS so they can drill or punch out the holes for the rear tail panel. Just thirsty for more knowledge on the Nova broadcast sheets.