Reply to "picture of the rare, 1973 400 fmx block"

George PAdmin.

DeTom,

correct! lots of room for stroking with this block, since the deck height is 1.1" higher than a Cleveland's. The lower end is wide enough, and the cam shaft high enough, that there is no consideration of the counterweights hitting the block or cam. Currently the longest stroke crank available is 4.25" (it uses Windsor crankshafts). with the stock 6.58" rod, that gives you a very acceptable rod length to stroke ratio of 1.55 to 1, and leaves 1.595" "compression height", the distance between the center of the wrist pin & the top of the piston. This indicates how much room there will be for the ring package, and anything greater than 1.250" is plenty.

Just like the engine Gary is building, a 0.030" overbore on the cylinders plus the 4.25" stroke crankshaft results in 434 cubic inches. Rock n Roll!

your stroked friend on the PIBB, George

9/30/0511:31 AM

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