Honing with Torque Plates - How Important?

I don't know that anyone has ever measured the distortion, but for the small diff in labor charge, it's a MUST on a Hi-Po motor build! Just find a shop that already has a plate for your motor and you'll be surprised that it's not much more than a "standard" hone.

Here's a tip from a Stock-S/S record holder. Always do the valve job on heads with them torqued down to a torque plate...think about that one!