just registered to maybe help with your smoking problem if i am going over old ground i apologize in advance.. I had a similar issue caused by a leaking intake manifold. it seems cj ports do not play well with PI intakes nor did they work with an offenhauser manifold prior to the PI.

the clue was that my valve stems were covered in carbon from burnt oil might make one think the guides were bad but no not the case . It was sucking oil from the valley at the btm of the intake. my cure was to go back to the oem cast intake even at that it took awhile to burn out the oil in the exhaust system. sure hated giving up that aluminum pi manifold but it just would not seal . Had the same problem with the previous manifold and rebuilt the motor to fix the smoking problem only to have it still smoke with the PI on it ..

so check out your sealing area at the btm of the the ports as i dont know what your combination is i cant say much about it but thats where my problem was. if your heads were milled that could also cause a problem with the intake