I am not too fond on the 292 cranks stroke,,4.120",,that's a lot especially w/an inline 6.

I believe you need to do more things to a 292 to make it rev high,not so much for a 250.

The main problem w/the 250's & other low deck blocks,is the front drivers side head bolt boss.
They tend to crack & even break when making a lot of power.
That's probably what happened to Douglas' 250 engine block ,,broke the front corner off.

I believe there is more potential power can be made from a 250 over a 292 turbocharged engine.
I used to rev my 250 to 7500 rpm, not on purpose,just to see if it made power up there & it did.
Twisted6 ,used to spin his 250 to 8000+ RPM.
Douglas, 7500 w/a turbo.
Not too many guys like to spin there 292's really high.
Guys in Brazil, do not use the 292,they all (for the most part) use a 250 engine for racing.

MBHD


12 port SDS EFI