Turbocharging an engine is a little bit easier on engine components in general.
But when the tune is off on a turbocharged engine, the pistons go away fast.
From what I hear, Guys in Brazil are running 1000 HP on 250 blocks, & those are weaker blocks.
I have not heard what a turbocharged 292 block can handle.
Only heard of 250 turbocharged blocks failing after 1000 & up HP range.
Douglas' 250 block failed before the finish line & ran a 8.2 @ 165 MPH Don't recall the HP his engine was making @ that time.
The last record ET for that 250 class was 7.8 seconds, that was done a few years ago, maybe there is a newer record?
MBHD