Yes, internals would be an area to go after. The crankshaft SCAT built for my last stroker motor weighs only 54 lbs. The typical stroker big block crank weighs 68 to 70 lbs. You can take weight out of the rods, pistons, piston pins, rings, etc. There are lightweight alternatives for valves, springs, retainers, pushrods, rocker arms, etc. Get the intake ported, switch to an all-aluminum carb, the alternator looks heavy compared to a Denso unit, etc. Probably 30 or 40 lbs in that engine that can come out.

I do love the work that you've done on the car. Very high quality fab skills and artistry. Some of the nicest work I've ever seen.