66 Evaporator Level & covers

Hey Everyone!
On my 66 Fastback I have the under dash A/C unit. I just found out that there is a leveling bolt that goes underneath the Evaporator that is missing. Does anyone know what size that is? Also, are there two covers that go on this unit? I have one that looks like the passenger side drain cover but no driver side. The research I have done all come saying the covers are for 65. Anyone with pictures or advise on this would be very much appreciated. Thank you all!

Thanks

Thats how I found out there was no "spike" it was shaking so hard I thought it was going to fall out. Thanks for the size