[BB427]

The gold color is just the plating/rust inhibitor that was used. Identify the grade of bolt by the number of markings on the head of the bolt. I ran into a situation using an ARP stainless steel bolt kit. 4 of the intake bolts were too short and I had to call the 800# that ARP sends with every kit to have them send me the correct length bolt. Your builder may have just put in what he had at the time????

If he used ARP they will not charge you for the replacement bolts.