1984 CJ7 WITH 84,000 MILES. IT HAS A T5 TRANSMISSION NOW. I ALSO HAVE AN EXTRA NV4500 TRANSMISSION. I ALSO HAVE 350 CHEVROLET ENGINE. I HAVE A 4.O HEAD. OK. WHATS THE BEST SCENARIO. THE 350 WITH THE NV4500. THE 258 WITH THE NEW HEAD AND FUEL INJECTION AND THE NV4500 OR A T18 WHICH I DON'T HAVE BUT COULD FIND, OR THE T5 THATS ALREADY INSTALLED. [LIST][addsig]