A CD4007 does not have a Jfet, it has Mosfets. It will be difficult to bias it into a linear amplifier with a high input impedance. It needs negative feedback to bias it correctly but negative feedback results in an inverting amplifier with a low input impedance.
CD4007 has MOSFETs inside, not JFETs. How do you plan to use them? Here is a note on CD4007 as analog parts, by one of the best analog gurus.
It may or may not be useful to you.
EDIT: Audioguru posted while I was reading the note by Bob Pease.