Question for the Holset and Megasquirt guys. I'm looking into upgrading from my 57 trim to the holset he351. Also will be upgrading from the logic module to a megasquirt 2 setup as well as converting to E85 sometime after I return from this deployment. For the purposes of boost control, has anyone used the command valve solenoid on the holset through MS to control boost? I've read that the solenoid itself uses pulse width modulation which would make it feasible to use. Also, what would I need to do to the exhaust manifold in order to bolt up the holset? Ultimate goal is somewhere in the 500whp range.