This is the standard Duty pump for the same 283, 327, 350 requirements for the SB Chev V8...

Its new replacement  New Water pump but not heavy duty..... for the Chevy SB with standard alternator/ generator and PS pump.. and fan blade.. but be carefull of how much other stuff you load onto this type of WP as the bearings can  colapse with things like fan extensions.. multi belt pulleys etc..

Good for early or simple Chevy V8 Small block needs. 

Impala, Belair, Parisienne, Laurentian, Nova, Early Chevelle etc.