Hi, Billybream has the right Idea, alloy heads distort at Haynes Book and SRM's suggested torque of 32 foot pounds. Start at 20,22,24,27, and then let sit a couple hours while you do something else, and check again. Then with the rocker box put back on, run motor to normal operating temp, with a large box fan blowing across fins and exhaust pipes. Now shut it of and LET IT SIT OVERNIGHT , then re-torque to 27, guaranteed 1 or 2 or even 3 will take more. And by the way you fellas that have a torque wrench sitting around unused most of the year, put a socket on there and make sure and do 10 or 20 click stops on some other bolt to get the lubes in the head working properly, so as to get accurate stops on your clicks. Chase the threads in the block with a tap, and clean the bolt threads with wire brush, light machine oil on threads optional. I did mine that way 9 years ago and have had no trouble since. Used to have to re-do every season at 32 pounds torque, it distorts the alloy and you get, (although small) compression leaks, mine quit altogether one year. Careful and thorough annealing is very Important, done wrong and you will do this every year, whether you want to or not.
BILL