Personally, I would eat like this if I were you ..
I am not a proponent of eating a lot of protein. I would eat 2-4 times a day (a quantity split into 2-4 meals). Lean meats, meaning red meat (buffalo, argentine 2%, fillet mignon, I used to like brisket, etc), raw salmon, raw tuna, chicken and turkey breast. Get brocolly and especially asparagus with the occasional assortment of bitter greens.
IF you choose to eat more than 1 lb of meat daily, before your meal, cut a thin cross section slice from a ginger root and squeeze 1/4 of a lemon's juice on it (it'll absorb most of it). Chew and swallow that first for digestive purposes.
Add some good fats (not a lot) .. I use daily 1 teaspoon organic peanut butter, 1/2 an avocado and 15 raw almonds
Carbs? less than 100g daily. I prefer cleansing with zero carbs and maybe you could try that if you never experienced it before. Once you get into keto state after a week or so, it is smooth sailing. Worth the effort to try it out in my oppinion especially for the look you are trying to achieve.
Get lean off drugs, I cannot describe you how your body will react to tren and cutters once you start a cycle at 8% bodyfat or less .. with your genetics even at 48-49 it'll change you FAST.
One thing I would like to see with your physique to make it trully impressive .. contact Disgusted and use his services to get the midsection you want. He can do wonders. I highly recommend him to both competitors and all other bodybuilding enthusiasts. He can take your physique and turn it into one of the top 49 yo in US I kid you not.