340 dynoed
Made several pulls with different spacers. This is the best average pull. I also tried 3 carbs. Mostly to know if they were jetted correctly. Spacers made a difference on this engine. Adding about 10hp and torque. A 4 hole just shifted the torque down a little lower, cloverleaf made more than the 4 hole , but the tapered 4 hole made the best torque and HP. Not bad for a cam that has .454 lift after valve lash and not a ton of valve spring pressure.
Made several pulls with different spacers. This is the best average pull. I also tried 3 carbs. Mostly to know if they were jetted correctly. Spacers made a difference on this engine. Adding about 10hp and torque. A 4 hole just shifted the torque down a little lower, cloverleaf made more than the 4 hole , but the tapered 4 hole made the best torque and HP. Not bad for a cam that has .454 lift after valve lash and not a ton of valve spring pressure.