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You can run a 4.75 x 4.500 (604) and you can use aluminum rods, they must be the radiused Bill Miller version or equivelent. I have discussed this combo with Scott Koffel. He has built several. poppaj

I think its a pretty common combo, mine has GRP rods.



So you guys are saying you can use the 4.75 stroke crank in a standard cam location block, with aluminum rods? I don't think so. My 4.50 stroke needed clearancing on the rods with a standard cam block, 2.325 pin, with GRP's. Even at 2.200 it would only be .125 more clearance.



I am talking a Indy or KB alloy block with stock cam location, NO small baseline cam needed, It is tight but fits.





I can't speak for the other guys but our block will except a 4.75 stroke with a standard cam location. I would assume any other aftermarket block would do the same