Re the blades - if you want to keep the Mark V blades for pond or backup skates, you might be able to have them re-rockered to match your Aces. You'd need access to a really good skate sharpener, and going from 8' to 7' would take off a fair bit of hardened steel at heel and toe, but from the photo it looks like you have plenty available. A couple of years ago, my sharpener used what was left of the hardened steel on my old blades (Mark IVs) to match the spin rocker and overall rocker of the then-new new MK Pros he put on my current boots. I did skate on them once after he did it, to test it out, and it and worked a treat.
Re the actual boots - they look in great shape. The leather might have dried out a bit by now, so they might not be quite as easy to get your feet to shape them as you'd be used to. When did heat molding come in - do these ones have that (at 15+, I'd suspect not)?