ya, 3k at 65-70 is right for 5th but one way to test it is

1st tops at 30mph
2nd tops at 60mph
3rd tops at 95-100mph
4th tops at 130-140mph
5th higher (theareticly, i found it should get to about 170-180 going at high rpms just by judging the differance in 100-110-120 pictures)

this is at 7k rpm