Buick used a basic Hardware Store Bolt on the (6) 1/4" Water Pump Bolts while the bigger 5/16" Bolts were a Flange Style Bolt. (used on the Water Pump and Timing Cover) Offered here are Grade 8 - Flange Bolts to replace the (6) 1/4" bolts. While not correct for a concours resto they will match the 5/16" Bolts and will not break during removal like a lot of the 1/4" bolts are known for. Also included is a Grade 8 - 5/16" Flange Bolt for the Alternator Bracket. Asking $11.00 which includes the USPS Shipping Fees. I have these same style Grade 8 - Flange Bolts for almost every bolt on item for the Big Block Buick and probably the small blocks as well. Can sell individually or as a complete set. Inquire for more details and pricing! Shipping will be by the USPS and packaged with Care. Will ship to any of the normal 48 States. HI, AK, & P.R. Exact Shipping Charges via the USPS If you want to use M/C or Visa just give me a call or use the link to my Die Cast Websites Simple - but Secure Online Order Form - LINK HERE. This is the same Order Form my Die Cast Customers use. It's Simple & Secure. Part would ship out same day if you use a credit card. Or Call me at (715) 874-6037 to discuss payment options Shop Hours Monday - Friday 1 pm to 6 pm Central time. Thanks for Looking,