383 appearing, 400 stroker with stealth heads question.

I have a friend drag racing a 541" (4.500" stroke") with 1.12" pistons. I'll bet he has 2000 runs on the pistons. Refreshed when the cam broke two years ago.

Probably not a combination I would advocate for on the street, but no issues as a race engine.

Tom
Is this in a low deck 400 block? Thanks. Kim