273 commando Build

Ask Uncle Tony didn't he put 273 head son his Bottle Rocket 318?
I think he did. Closed chambered 920's?
He's a dumb ***. "67-69 273 closed chamber heads" I love to fact check him and prove him wrong!

64 and 65 were closed chamber with the odd intake bolt angle
66 and 67 were closed chamber with the normal LA intake bolt thread size and angle
68 and 69 were open chambered with the normal LA intake bolt size and angle.

His description is at the 2 min mark here: