505 dyno test results

The moroso chart shows 112mph/31” tire/4.10 gears to be 5000 driveshaft rpm.
If you’re not driving thru the converter too bad, 5600 engine rpm might be enough to get it done.

For the OP’s future build, taking the Hyd lifters out of the equation should cure the power curve “falling off a cliff” as being a potential problem.
Just because the power peaks at 5600 doesn’t mean that has to be the end of the usable power curve.