Why the sarcasm?
Will it hold up to a Hellcrate engine? I’d guess that it wouldn’t last long but the OP is asking if anyone had done it.
Given that there’s already a pretty stout engine turning it, that’s almost definitely not a stock 904 so it’s not ridiculous.
@hellcat dart , I don’t know of anyone who has done it but I recall 500hp as about the most anyone would consider putting through a built 904. Maybe you know something we don’t but your best bet is probably to sell it while it’s still functional and put the money toward a 727 or ZF 8spd, T56, etc.