I ran into same issue stuffing 6.1 in 72 Demon! Pick up tube I used was for 2010 as per my donor SRT. Turned out my block was a pre 09! What did you torque the cap bolts to when swapping the extended bolt to support the pick up tube?
Nice car! I'd have to double check with my notes at the shop I remember it being around 120 ft/lbs in the end. Since it was a TTY bolt it was an initial torque + a rotation of a certain amount of degrees.
