Thoughts on this combo for E85

I guess the big problem with changing the Pistons is that the assembly is already balanced and I really don't want to get back into re-balancing it. Last time I took anything to the machine shop to get it balanced, I ended up picking all the parts up 2 years later untouched. The guy there ask me when I needed it done and I told him 2 years ago. I thought about dropping the rotating assembly into a non magnum block which would require some machining but no re-balance but then I don't have any non-magnum heads right now. Around town the E85 is not a problem but I wouldn't want to head out on a road trip needing it. Maybe switching blocks and buying some new heads is the answer. I actually already have a set of dished stroker pistons and another set of eagle rods that I could put back in the magnum block, all I would need is a crank.