Seat Pan Height lowering for a 67 coupe with Procar Rally seats

[Hippoposthumous]

I have a 67 coupe with these Procar Rally seats:
https://www.cjponyparts.com/procar-seat-vinyl-rally-series-passenger-side/p/SEAT51R-V/

I have a very long torso, and my head is in the headliner. I know that it is possible to swap to a 1 inch dropped seat pan, but that won't be enough. What other options do I have to get quite a bit lower, and farther back?

 

[horse sence]

69 boxes not only drop it 1 inch ,they also tilt back ,the can give you quite a bit more head room

 

[Hippoposthumous]

That's interesting, is that the same as the Cougar box they usually recommend for this?

 

[horse sence]

Probably the same

 

[The Shemdogg]

Remove the seat pan, weld in some plate steel n bolt em to the floor

shem