Greg,
No good news, man! The pistons are ultra short 1.175" comp ratio. You'll need 6.125 rod - occasionally the same rod used on Small block Mopars. The small rod end should also be bushed for them, but that's an easy one. The only drawback is that the big end is too large to be used on a 250 crank. The rod pin is 2.000 std, the sbm rod pin is 2.125, so no bearing to fill the gap. Since the 250 crank is nodular iron, no welding for stroking or filling gap. But may sound interesting to make a weird combo on a smaller V6 chevy. Or go big, turn down a 292 crank to fit the smaller 250 block, use some proper rod - the 5.700 rod out of the 250 if you care to turn down the rod pin from 2.100 to 2.000, and You're thru. There is a lot of clearencing into the block, as well as some counterweights turning down also. Guess that a cam for a 292 is required because the fuel pump exccentric interferes with the crank somehow. It's a bunch of work to make it happen, the r/l is lousy at 1.38, but the looks of an innocent low deck 250 and the big big 292 stroke looks somewhat interesting.
But if I were You, I'd also have got them. The price is just ridiculous. Great deal, Dude! Take some time and You'll end up realizing a decent use for them!
