[Artur]

Dear Blykins, thanks - no, he said it was purely due to size consideration just to fit it right...for me, it's close to speaking French cause from my side, I check what sort of pistons would fit into my 351w based on the listings I found in summit racing and finally decided to use Speed-Pro Hypereutectic Pistons H336CP4...ironically, I didn't know about summit racing's online help and chose these Pistons for my 1972 block just based on my shallow understanding of these matters ! Then obviously it was a surprise to me why this "size suitability problem" happens cause they were just supposed to be made for 351w....anyways, it's a mystery for me (1) why the size would not fit and pistons need to be shaved off and (2) if these my piston selection is right for my vehicle and what makes these pistons different than others (I read that it's a mix with silicon which increases durability but again, not sure they are right choice for my daily commute application)

Pls feel free to keep your answers short and longer versions are always most welcome !

Thanks again