360 dyno

That looks like the results I got on my 'Cuda

My build:
Low compression build 8.5:1 87 octane
.060 over dished pistons in the hole
Comp XE284 Hyd. Cam
Eddy Alum. RPM heads
Eddy Air Gap intake
Eddy 500 cfm carb
Stock cast iron big bore manifolds
TTI 2-1/2 exhaust with h pipe
2800-3200 converter
Roller rockers

My air/fuel was right in the middle
Only had them run mine up to 5000 rpm

Those numbers may be typical for a low compression build
with "big" cams.