I dont think so. I think you have to put small block cylinders on it. small block 600 cylinders will fit. Stroke is dif so they have to be machined anyway. Then bore them to 700cc (660) or 800cc (797)...its a pain in the @$$ really. You'd have less time and money into a small block motor from ebay.
In my garage right no I have am 07 440 engine, '98 700(bored to 86mm) cylinder, 440HC head and an 800monoblock twin cylinder. None of these parts are interchangeable.
As far as what Zippi said, he is close. You can bolt 600 cylinders onto your 440 crank/crankcase IF you machine the cylinders or case a couple thousandths to account for the 600 crank being a slightly longer stroke than the 440. You can also bore the 600 cylinders out to 660, 685 or 727
726 engines are the old polaris mod castings and porting
727 is SLP's version of the 726(they bought the casting rights from polaris), it's ported a little slower and safer than the 726 so it's pump gas compatible.
797 engines used custom (usually one off) stroker cranks and the 726 cylinders
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