I finally found a link to the curves- it has other test curves too
Calculating Your Own SAT 2 Scores
French w/o listening
85 to 75 = 800
74 = 790
73 & 72 = 780
71 = 770
70 & 69 = 760
68 = 750
67 & 66 = 740
65 = 730
64 & 63 = 720
62 & 61 = 710
60 & 59 = 700
58 = 690
57 & 56 = 680
55 & 54 = 670
53 & 52 = 660
51 = 650