According to ARP's website they do not have a head stud kit designed specifically for the b18b - only the b18a. Has anyone purchased ARP PN#208-4302 and used it on a b18b block. If so did everything fit up right? ARP says that the depth of the block could be different. For refrence PN#208-4302 comes with (8) 7.1" studs and (2) 8.0" studs with a diameter of 11mm. According to their tech. dept. if the studs fit in the block screwed all the down and have approx. 3/4 of an inch remaining on top then they can be used (3/4 of an inch to compensate for a nut and washer). So let me know if anyone has done this already. I dont really want to perform an experiment for ARP on my wallet.

 

They are the same. My friend used the b18a on his b18b

 

we stock the b18a stock number and have for some time...they ARP have mixed info when you call. The block depth is the same as far as any info we have ever heard of.....you will be fine Good Luck