Your tractor will play with a 6' mower in just about all conditions and will handle a mounted twin spindle 8' cutter in most. It will do almost 3X the work that your 8N will do and the LCG model is equally at home on steep ground.
Let me know if you need a grill. My local dealer is moving and is selling (cheap) old stock that they do not want to move. I bought two NOS grills for 63-64 *000 tractors and I believe that I saw a plastic grill to fit yours on the pile.