How big are you going with it. Being the budget racer I am up to .030 over I don't even bother checking them, but that's me. If it keeps you awake at night have it sonic checked

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time