putting a block back together with used parts out of shop ,,all the parts came out of blocks with cast number 354898.........the lifters i took out of the motor im building were rough so i grabbed some out of shop ,didnt really look at them cause i thought they were all the same..when i went to install push rods they were really rough also..so i grabbed some out of shop,they were smaller in diameter than the ones i took out ..and i noticed they had a hole that ran thru the push rod..i never noticed that before..all the others big or small diameter dont have the hole thru center..one of the push rods that have the hole was bent...so i went to use a big diameter push rod and it feels like its not going into lifter...are there two sized lifters, big and small hole for push rods...and whats up with the push rod with hole thru center ....school me please,,,,an thanks as always,,,,,,,,dewy