john erbe
Noble
Having read some past posts I believe some of you have done this and could answer some questions as I have started the project having just pulled the TB from a wrecker 560. Aware that I've got to machine a larger bore on the 6.9 intake manifold but, what about the top end, can the port on the underside of the 6.9's air/fuel manifold be enlarged or do I need to bring over the whole 560 set-up? I note that the latter's belly is plastic as opposed to metal on the 6.9.