OK I'm confused on MOPAR Tunnel Ram P4532175

Thanks to PRH. I did a lot more digging and found the P4532175 is the casting and not the part #. Looks like the part # is P5249464. and as far as I can find it looks like its LA 340-360 heads with large intake ports. WELL THE BOOK I REFFERENCED HAS IT WRONG THAT # COMES UP AS A VALVE SPRING.