I test fit it in my 109 block, and it fit fine but one of the counter weights grazed the main webbing just above a main cap (can't remember where at). I've talked to several enging builders, and most recommend using 6.350" rods, but I know of a couple guys that ran 6" rods and it worked fine. Either way, you'll need custom pistons which are available through a few vendors here on the board. I got a deal on a complete stock stroke forged rotating assembly, so I have no use for this crank.
HTH
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