I took the opportunity to run the Crane cams 343901 against my Isky 256/262 cam in Desktop Dyno. Here are the results.

Crane Cams 343901
Max Torque=469@3500
MAx HP=383@5000

Isky 256/262
Max Torque=470@3000
Max HP=373@5000

While I cannot attach the graph from these, The Isky had the flatter torque curve, But on the downside it was 10 HP shy at 5000. But then again when do you tow at 5000rpm.

When I was looking for a cam for my 390 tow vehicle I spent a long time comparing before I bought the Isky. I was looking for a cam that would deliver max torque about 500rpm higher than my cruising speed.