Does it mention an 8784234 in the book anywhere? Do I understand then, assuming the 878 was intentional, if mine was cast on March 14 they were using 8784234 until 11 days later when (theoretically) they switched to stamping 979.. So I could have the new 979 casting mis-stamped, or the last of the 878's? Doesnt matter really, other than would make another cool page in the story of this bird...
I'll have to find that book...
'68 400HO Coupe, 4 spd, 259 interior, Windward Blue. My other car's a Johnson 15 outboard on a '61 Starcraft rowboat... Just sayin'.