You are going to screw a good thing up. Diet is all you need... and up your cardio/activity.
You want to restart your metabolism

Change your diet. Stop eating all processed foods. Strict meat and a wide variety of vegetables later you can add grains like rice and occasional pasta. (You might find it necessary to stop your weight loss because you're back to those days when you can eat like a horse and not gain weight).

You are at the high end of your weight range so focus on shedding the fat. I wouldn't be surprised that there's a bit of visceral fat as well.

Basically you are shutting down your own extremely good test levels to artificially increase your metabolism with drugs which has its own list of sides. The risk at our age is getting back natural testosterone levels after you cycle. Odds are greater that you end up on TRT.

Simply walking at a 3.5 mph pace for 1 hour everyday for 6 weeks will lean you out, and drop your BP to something like 115/70 or 100/60. In other words what starts out as effort. Becomes effortless.

The key is activity. Not cardio (a subtle attitude shift towards play). You have a routine in the gym. Adopt a younger man's routine outside the gym. You can quit literally act and feel 15 years younger.

I'm talking from experience.

Try 30mgs anavar and 250 test twice a week.

If you are 66 and got old man pudge you dont have much longer before losing energy to get leaner and tighter so wouldn't you want to go fast and start high? Go slow and what? Wait till you are 70 and its harder? Drop the var and up the test and since you've worked out consistently for 40 years there should be no problem with it.

I'll also add this. Based on the picture you posted, I'd recommend trying Reta first with a proper diet and some resistant training. That will help you shed some body fat and give you a much better foundation to build from. If you truly want to start low and slow, than there's no need to rush into the steriods. Just a thought. Good luck.

What's your pre blood work look like? 140mg a week is just trt levels. 8-10 weeks really isn't gonna really benefit you much since it will take 4-5 weeks for the test you're running to fully saturate in your body. I'm not an expert by any means and I'm sure someone wiser will chime in soon, but I would definitely consider going at least 12 weeks and increasing your test to at least 400mg a week. Drop the Var at that dosage, especially if this is your first cycle. I understand wanting to start low and slow, but I highly doubt you'll see any results at the levels you're considering. Also, at 66 years, why even bother with pct.