W2 Heads
Thanks PBR and Rat Bastid! I did look at the head bolt boss on each head and did not see any break through but I do not know how thin that area is. I will probably put the spacer there anyways since the ARP head bolt kit I have has the long head bolt for that area. On the exhaust plate, yea I noticed getting a standard spark plug in and out with the plate attached is damn near impossible.