Just got a nice roller block back from the machine shop that cleaned it. If their really dirty I like to sent them out and have them jet washed. Like a big dish washer only bigger, hotter, more effective and your wife won't complain. $45 and they come back spot on clean. Years ago I picked up a set of KB pistons #260, these are the light weight ones with the 102 gr. pin. I have a set of 6 inch eagle rods and a steel crank to finish it off. I know a lot of guys like the 6 inch rod motors better then the 5.7 ones. I have never ran one and really don't have a vehical to put it in. The nice thing with this motor is its a 4 bolt that's set up for a roller cam. Block is also a rare one that is drilled for a external fuel pump. Has any one run a 6 inch rod motor, and if so how did they like it.