I am putting a d16a6 head on a d15b2 block. I ordered the head gasket set and what not, and i was told today, that when u put a new headgasket and everything on you want to buy new bolts. because where they torque em too stretches them out so there no good after you bust em off. is this true? what bolts is it actually?head bolts? thats expensive, guy said he paid 35 bucks for the bolts for his escort.