That's the main reason why it's getting repainted, it looks the same color as the F word you mentioned. Maybe a crate motor?? This dark blue is the first color the motor was painted, it's on there pretty good. The correct color was applied over the top and comes right off. I just finished painting the intake the correct color, now that's a pretty blue! Is that where they coded the year of the block in 69, back by the distributor?
Jeff