ATK engines 408 sroker with Magnum block LA build

I notice they have a complete engine from carb to oil pan. They say it's a street cruiser. $4844. 290 HP & 385 in torque. But they claim 10:1 compression, unless that's a misprint that seems kinda high.

This one?
Should be 9:1. I see their site says ten. I agree that's a type o
HPE-HP73C - ATK Chrysler 360 Base Engine • Iron Heads • Hyd Roller Cam • Base • 290 / 385 FT LBS