MPG Motor Magnum vs. Hemi

This is a fun topic with a lot of great advice and ideas. I did the magnum swap on my Crewcab for about $600. I used everything I could off the donor and fabbed up the rest. It has been the single best thing I’ve done to the truck. It had 139,000 miles when I put it in and I’ve put about 30,000 super reliable miles on it. That’s what has me on the fence about the 413 that probably needs a rebuild. I could probably have a magnum in it running for under $1500 which I feel would be equal to the rebuild cost? Just trying to weigh my options.