my dad just picked up a 50 chevy truck. with a 6 and we don't know what it is? engine # is 02I8742T55Z can someone help please!

Are you sure that's the right number? Here's a page where you can look at some casting numbers for some Chevy 6's: http://www.inliners.org/becks/BCN2.html

Dear Troy;

You can check the "casting #'s" link in the left margin of our home page too.

Either way you do have the wrong number to check.

You may have written down the one by the distributor in error

Good luck.