400 hp 5.2l vs 5.9l Magnums

My 360s been on the stand ready to go for 15 years. Stock bottom end with the template ported heads R/T cam and factory top end kit, 1.7 roller rockers, springs, guide plates. m1 intake. Always wanted to know how it would perform, now that I have a valve grinder I’ll pull heads to do them. Get the Duster done and try this engine this summer, btw I have the .501 cam to try also. Can’t wait