aligntment dowels in block + arp studs, both necessary?

[jt15833]

I understand the need for the 2 alignment dowels in the block (intake side, one up by water pump one @ back of head) for use with stock head bolts.

Are they necessary for use with ARP head studs? Anyone had luck without them?

[bentvalves]

yea for sure if the ARP hardware doesnt interfere with it, which theoretically it couldnt, then yea you would want to use them.

[Chris859]

I definately recommend using the alignment dowels with the arp studs - at a bare minimum they help keep everything square and together while tightening the head studs. I can also personaly say they do not interfere at all...