My guess would be either -Too?
Hard to be remorseful when you basically purposely grenade a perfectly good motor.
Stock Terminator had forged crank and rods and is intercooled and only ran 8# of boost.
Trying to stuff 17# of boost on a non intercooled turbo with a stock Teksid bottom end is just asking for shrapnel.
I find it baffling that they all seemed surprised that it exploded.
Maybe they knew it would, and they did it for clicks, who knows?
1) They only did basic "research", meaning finding out what kind of motor it was (specs) and what cars it came in and decided to "try something" because boredom or needing content or,
2) They saw that it's a modern motor like an early 3rd Gen Hemi or LS1 and figured, we could abuse those motors like this so why not? Like a comparative beating or seeing what it could take using the same treatment they would have undoubtedly done to one of those other 2 motors. And then any failures could be attributed to general lack of knowledge of 4.6s.
I think part of shtick of his show is that he has 2 kinds of cars, the ones he loves and wants to build up and be proud of (not really show quality, just solid improved) or sell, and the ones he doesn't care about and wants to slap around to see how much they can take. This Mark VIII was the latter. "Hey guys, what would happen if we slapped a turbo on this old car and whipped it to see how much HP we can make? Right?" He obviously had no intention of keeping it or of flipping it so spending 3x the money to do it right would be a waste.
Also, at least in this instance, I think the goal was to push the car/engine to the point of failure, as a baseline, and then do it a second time closer to right and see what those results would be, as a comparison. "Oooh, when you do it right it actually doesn't explode!" I hope they put a real rear end in it, too, along with a solid transmission. No more excuses for why the car blew up before really showing what it could do. That happens too often on those MotorTrend shows (Hot Rod Garage/Roadkill/Roadkill Garage).