[v8klla]

To be honest with you we recommended against the O-ringing especially on a street driven vehicle as we feel some A1 head studs and a good head gasket will be sufficient for upwards of 700whp.

This customer is having Devo Tuning in Illinois assemble the long block, and they plan on using copper O-rings and the Mitsubishi MLS head gasket. As far as we can tell their thoughts here are that the O-ring will help avoid a blown head gasket by reinforcing the seal of the MLS.