bbc gen. quest.
 

on my 454 i ran the casting# and suffix code and it says its a 85 truck le-8 240hp my question is why does it have (pass hi-per M IV casted on the front,back and one side) whats the difference of this one and a std block? thanks codes found at http://www.chevy-camaro.com/

thats nothing special thats on ALOT of 454 blocks 2 and 4 bolts