The 6pack fits under both the flat hood and bulge hood in 70 , it fit under the stock hood on a 68/69 Road runner, I'm pretty sure I've seen them under the Ramcharger hood on a 69 Bee/R/T which is a flat hood so I'm 99% it will fit under the bulge of a 68/69.

BUT that said you need to confirm it before closing the hood.