Thanks for the responses. the Corsair belongs to a club member that purchased it used, he asked me to test fly it.
After a thorough field check I thought it was a little nose heavy. On take off, up elevator, slowly adding throttle up to a good ground speed and when I eased the elevator to nuetral, it nosed right over quickly.( twice). I explained the changes he could make to correct the problem,(bend the landing gear forward & larger wheels, and that there may be some down trim in the elevator at nuetral). I wanted to try one more take off adding some up trim, he didn't want to chance it until the changes were made, and asked me to make the changes (what are friends for?)
After making the above changes I checked the incidents and the stab was at 0 degrees and the wing -.5 degrees, my thought was that this could have the caused the nose overs. I was going to raise the wing incidence to +1 degrees but wasn't sure that was correct, thereby the reason for my post.
I'll now change it to 0 degrees and leave it nose heavy for now before I try again.

Bob