Anyone watch the new engine masters?

LS IS the competition.
The car guys on my boat are all Chevy guys, devout LS fans.
There are multiple LS aftermarket websites.
THe gospel on the street is that the engines are still good to get or run even with 150K miles on them (rings???).
One guy on my boat just stripped a 150K mile Chevy TAhoe for the 5.3 LS, 4L60E, aluminum drive shaft and wiring harness for $700. His friends thought he stole it.
It replaces his blown 355 and turbo 350 three seed automatic.
These (LOW BUDGET )guys on a budget don't stroke these engines, simply install the set up.
They look for older LS engines and buy the 6.0 or greater LS engine' cylinderheads and swap those onto their engines - FOR THE SAME (or less) PRICE IT TAKES TO BUILD A 6.0 367" LA.
6.0 (aluminum) with a 4L80 heavy duty four speed automatics sometimes list for less than $2300.
I disagree with the first part of:
You know, I'd like to know where people get this notion that Chevy's small blocks are so much cheaper. Maybe 2nd hand parts wise, but if you look at new prices, they're about the same cost, with some options such as intake manifolds running close to a grand or more. Most parts though, are within 10-15% range of an LA,RB, B series mopar, 3rd gen hemi's are a little more yet but still not a giant difference. So I debate the " much cheaper" build part. Now, they do have a LOT more aftermarket support and product availability. One of the guys in my local car club is running a late model GTO with the LSX i believe it is, I know hes got close to 9,000 in the engine alone, plus the nitrous kit and he's putting down just under 700 on motor, NA.
-Because of the exceptions dukeboy_318 writes about. @dukeboy_318
There will be more of these LS's than 350's.

My question is how does a cheap 383 or 400 BBM compare against six liters and another gear?