Magnum replacement heads

Customer would like to make 400 flywheel hp, with a stock short block, (360) a 214/218 @.050/ .532/.539 lift hyd roller cam. These heads and a edelbrock air gap. Not sure this can get there

I suspect these are the same heads as these. I order them from a company called CCCN and yes the guy that runs it is Chinese and the name he goes by is "Chinese George". The heads take a metric F@#$ ton of work to equal an EQ casting. J.Rob

360 TrueStreet Magnum Build