Team Tied set up for a Procross 800 , What helix is the best?

Hi, I have a 13 800 129 track with a D&D Riot kit, I want to change the secondary to a Team TIed , I have been told to run this one



https://venomproducts.com/index.php/parts-catalog/product/snow-helix-ac960038 and run it on the 75/61



and I have also been told to run a 66/56


I have been told to use either of these springs,


https://venomproducts.com/index.php/parts-catalog/product/venom-snowmobile-driven-spring-210176


https://venomproducts.com/index.php/parts-catalog/product/driven-spring-210181


Honestly I am confused, I ride tighter trails and farm fields mostly, I am not out on the open lakes often and I want a nice quick sled and backshift.


ANy ideas and thoughts on which would be better?

Well I went with the 66/56 Hopefully this is the right choice, I probably will purchase the 76/61 also. Not sure how they will act.