Gen 1 OEM shock spring?

[CoastToCoast2]

Ive had the oem shock revalved for my 70" dragbike. I am 180 suited. I saw a utube video Bock did where he simply pushed down on the subframe and the tail collapsed easily and came back up by the count of 4. My question is what spring (Lbs.) would i need to get the result Brock did? I do have a stock spring and a 850 Lb spring which seems very stiff to me.Its preload is backt way off but the tail doesnt move an inch with me pushing down as hard as i can.

 

[sixpack577]

Is the Compression adjusted all the way out/hardest setting?
It must be if you can't compress the shock any.

 

[CoastToCoast2]

Is the Compression adjusted all the way out/hardest setting?
It must be if you can't compress the shock any.

Comp is back off nearly all the way...i guess the 850 spring must be the issue?