[jhirasak]

One option on selecting a cam for your 331 engine might be to use the software tool provided by Comp Cam (Camquest free download). It allows you to enter all of the parameters of your particular engine and then compare different cams showing the hp and torque output for each particular cam over the rpm range you plan to operate. When I compared my chassis dyno hp output with the predicted flywheel hp output predicted by the software, the results were fairly comparable.

Just for your information, my engine is a 331 block with the Comp Cam XE282HR (hydraulic roller) using AFR 165 heads, 10 to 1 CR forged flat top pistons, and Shelby tri-y headers with an X-pipe.

John