Whats the difference in XXX and YYY on the block?

[JerryDaugherty]

???

 

[Modular2v]

this is a interesting thread...wish we could get some answers lol

 

[bottlefed88]

My original 88 block was a XXX

Matt

 

[JerryDaugherty]

maybe its oone of those things we will never know.. only speculate..

 

[bluevenom867]

I bet it was just different molds.

 

[bobcatv8]

Actually, I think I did answer the question after my smart aleck male/female remark. A raw casting is a raw casting, differences happen later when they are machined. There is always some kind of marking on anything cast to tell when and where it originated from.