What Are You Doing/Have You Done To Shed Weight?

200 pounds is reasonably easy to shed, but is the equivalent of 48ftlbs torque at 2200 stall; But only 37 at 2800. You can cover that with cylinder pressure and;
keep your heater (~37pounds),
your fold-down rear seat (~70 pounds),
your bumpers (~30 pounds each in my 68 Barracuda) ..
My dual 3" exhaust system is IIRC ~70/75pounds

If you go with alloy heads, you can run the cylinder pressure up to at least 185psi and I still burn 87E10.; then you won't care how heavy she gets. Put 4 fatboys in mine and still scared the hale-marys right outta them.