fordracer,
I don't know specifically the difference between the CJ and BT heads, but the intake on the 514 requires some thought (if you decide to go that way).
Competition out of Ohio built/installed my 514 (starting with the Ford Crate - and CJ heads). The single plane intake was sold and they fitted mine with a Holman Moody dual plane (which is rare), but they really liked it.
Just something else to keep in mind if you plan on any street use.
Oh, one last thing. I have Goodyear 295's on 15" wheels, and the previous owner warned me about breaking traction under full throttle on I-75 - at 85 m.p.h.!!!
Think about that before you overbuild. The 514 is a beast. You need slicks to really feel what it has to offer as it is.
I don't want to get your thread off-course, so I'll shut up.
