Stock Bolt Circle

I was looking for the stock bolt circle size for a 74 Duster.

I am thinking it is 4.25", but I wanted to make sure before purchasing the wrong wheels.

I am getting a pair of 15x6 and a pair of 15x8 Convo ETs from Centerlinewheels.com.

Here is the link:
http://centerlinewheels.com/wheels_detail.php?mw_id=34&sw_id=365

Thanks in advance for any help given.