quick question, stock flex plate

how much power can a stock flex plate withstand? its for a 318/904 with a PTC 3000 stall converter. performance rebuilt 904 with red clutches and kolene steels, transgo 2 shift kit.

355 sure grip rear. my 318 has about 375 horsepower, with nice cam, rpm manifold, roller rockers, RHS heads from brian, ...

can the stock flex plate handle this power?

i need to know so i can continue with the engine/tranny install tonight. :)

heres my stock unit: