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with a very expensive custom made crank. The 10.3" deck height is the same as a 460 but there is slightly less room for cam clearance. The 351C/351M/400/429/460 use the same timing gears but the 429/460s have a longer chain. (+2 links)
Maximum size depends on the bore. 4.5" stroke with
4.0 bore = 452
4.030 = 459
4.060 = 466
4.185 = 495 http://www.kb-silvolite.com/temp/calc.php
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I was in the middle of the variable cam answer but the thread was moved so I'll respond there.