How far can one safely deck a 225 block?

my68barracuda said

Going with 198 rods or aftermarket long rods and 2.2/2.5l or other appropriate aftermarket pistons gets you to a zero deck piston height.
That and a light clean up cut on the block and head got my slant to a 10.5 static compression ratio.

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I considered that... the problem with that idea for me particularly is that my engine is a late model cast crank engine. The 198 stopped production in 1974, and thus never saw production with a cast crankshaft (began in 1975). Since the cast crankshaft has narrower journals, there was never a 198 connecting rod made that fit a cast crank.