[SBS933]

While I was changing out my gear drive, I noticed Hi Performance Pass on the block (1988 Gen IV 454 bbc). What does that block have that a standard pass. block doesn't ?

 

[gn7]

While I was changing out my gear drive, I noticed Hi Performance Pass on the block (454 bbc). What does that block have that a standard pass. block doesn't ?

They all say Hi Perf Pass unless it is a tall deck truck block



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[SBS933]

OK that works, I didn't think I had any special block. When I looked up the numbers, it didn't state anything of the sort. Thanks Bob

 

[wizbang]

S/B a 4-bolt