Just to save you going to such an "extreme" length of binning it, how about just stripping the finish off and using it in an unfinished state and regularly die-penning it to see if it is going to start cracking.

I know it is a risk, but if it starts getting small stress cracks BEFORE (if) it fails completely, you should be able to pick these up pretty quickly?

At the end of the day it is your engine, and I wouldn't want to suggest anything that may cause a fire , but it looks so good that I would be trying anything that was acceptibly safe to retain it (perhaps a flat metal shield can be temporarily rigged up or the manifold could be heat-wrapped just to protect it from a worse case scenario). Plus carry a fuck-off big extinguisher in the car just in case?