Your info is a big help. I appreciate your reply. The 3483 is just out on the block all by itself, but notice that it is the last four digits of 473483. I transposed the last two digits of the crank number, it should read 360407 instead of 70. That number ID's the crank used in that block, as nearly as I can determine. 1984 matches up with what I was told when I bougbt the engine. Came out of a '80's model PU. Thanks again and welcome aboard. You ought to think about paying dues. The 12 port news is worth more than the dues! You'll wind up reading every word of it. Ray