Pully Set question

[Scott e]

Hi guys,
I just received my MARCH pulley set from Summit Racing.
The Crankshaft pulley is 5"diameter. The crankshaft size pulley on my motor is 6".
Will this work? I am not using power steering or AC.
Or, do I need to return. They do not give the pully size when ordering.
I understand it will run slower for the alternator and water pump.

This will be a street use car only.

thanks for any help

[michael everson]

Are they ARP brand? If so I used to run them all the time with no issues. I forget the diameter, but it was smaller than the stock one.
Mike

[marshallmosty]

A 5" diameter crank pulley should do just fine.