When looking ffor a new camshaft for your build or to upgrade your eexisting combo.I suggest getting with Camcrafters.Tom Monroe contacted me about an upgrade that he's doing and we decidded on a 63 09 cam for the 425 horse engine .That was the 690 cam,and even with upggrades like a tighter lobe seperation[110] and lobe centerline[106] the cost was 265.00 plus shipping.Thiis is the best price that I've seen for a flat tappet cam post ccovid.