 Your in the right forum. I also have a 149 with a modded K321. Use IH Hydra-tran and a CC filter. If you have a Case/IH dealer near you you can get everything there or CC suppliers on this forum. I buy Hdyra tran in bulk, At 5$ a qt, I just take two plastic milk jugs and the Ih dealer to fill them. I suggest that you go to the Technical section-tractors and print/look at the chassis manual for the 149. There is also a section for your K321. Good luck with your endevers on the 149. 
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Don B, USAF 1962-1968, Ft. Wayne, IN
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