Hot Rods Flathead torque spec

Torque spec for edmund aluminum heads for a 52 mercury flathead?

 

Not sure that the torque specs for an aluminum head are the same but here is a link to the factory torque specs.

http://www.vanpeltsales.com/FH_web/flathead_torquespecs49-53V8.htm

 

According the note on that webpage, torque for aluminium heads is 35-40 ft lbs.

"Reduce torque setting to 35-40 ft lbs for aftermarket aluminum heads or as directed by manufacturer."