I got these pistons and rods from school and got them for free the pistons are from probe industries part number P2256F-030-4.030" they are forged aluminum and they are on eagle rods with arp bolts my instructor said this set will make my 350 into a 355 all this will be going into a 1989 L98 350 tpi for the mean time I will take my motor apart and bore the block to accept these pistons less fiction and wait and then when I get more cash saved I will turn it into a 383 stroker..so does any one know how much in parts is my setup worth and let me know your opinions