For all aspiring Garand builders I suggest the first investment be Gerry Kuhnhausens's comprehensive and excellent shop manual for the M1/M14. Its the best single source of info going on these fine rifles. Knowledge is important, especially considering that its quite easy to dique up a new $400 barrel if you don't know what you are doing.
I've had a copy of Kuhnhausen's manual for the past 17 years and its been my guiding light for several dozen Garand builds. A couple of other useful references are the US Army 1947 TM manual on the Garand which is available in reprints and the M1 Garand Complete assembly Guide by Walt Kulek. There are a couple of big head scratchers in Kulek's booklet though. In the first case he states that its acceptable to have the barrel sit up to 60 degrees off vertical index before tightening it. That's waaaay too much. Secondly, he states that the bolt should be lapped to get sufficient engagement between both locking lugs and the lug seats in the receiver. Lapping was never done in military service, but its OK as long as you know exactly what you are doing.