Hi Howard,
I'm not a doctor but here's my opinion:
Your blood pressure sounds fine for your age. My doc says the new studies are actually showing it OK for older folks to have systolic even up to about 150 without worrying to much about medication, contrary to prior vogue of reducing blood pressure at all ages at all cost (not true for young persons, however) . Plus it's totally normal, as you get older, for the systolic to raise a bit and the diastolic to stay on the lower side. Lose some weight and don't worry about it.
I am not a fan of fish oil. Eat the fish themselves! Wild salmon, mackerel, herring, sardines, plenty of other fatty fish can be delicious. Sample around and see which ones you like. If you don't like it for full meals, get tins and have it with crackers every now and then.
Even your cholesterol situation sounds good. If TOTAL cholesterol is low (e.g., under 170 or 180), I would not worry about HDL being on the low side. But the fatty fish plus exercise will raise that HDL right up.
My two cents.
mphgrove