First, what is your gain element of the oscillator look like - is this a Pierce configuration?
Looks like you drew a goofy amp - is that a Neg R configuration to (attempt to) knock out the fundamental 40M ??
For Crystal 3rd OT, there are a couple classic choices.
1) Use an external L/C trap, or
2) a very small R in feedback for the Pierce configuration.
(Intuition says a large R is appropriate, but there is some very tricky analysis that has a small R knock out the 1OT. It's MIL spec even, if I recall.)
If this doesn't make sense yet, read some app notes. They is a lot of piecemeal material out there on crystals, so after reading 20 or so different ones, re-read this. Seriously.
Wave