Specs are 497 horse , 520 lb ft torque
On dyno last summer in 95deg 110 % humid
Room.
5o5 stroker , 1.6 rockers , 20" vacuum
Dyno operator chuckled and told me
400 horse , he can tell by idle.
His hand flew off the throttle when the outboards
Opened.
It REAlly idles like a 318 stationwagon