Van Pelt sales in the US have a lot of information posted on the flatheads. Here is a link to their page for torque specs on the early engines:
http://www.vanpeltsales.com/FH_web/f...ecs32-48V8.htm
They are a small husband wife organization. I like dealing with them because they have continued to stock the 3 ton suspension parts we use on our CMPs, whereas most of the big names seem to have discontinued carrying that class of truck parts, instead concentrating on the smaller more popular 1/2 and 3/4 tons.