X2

Tunnel Ram is the WRONG way to go for single carbs. (Still werkin on Nordie over that) For show only. Puddle fuel at the back, horrible cylinder to cylinder distribution, only made for certain drag racing rules in certain classes and wanna be street runners IMHO.
I'm not even sure you need "Hi-Rise" or spacers with what you have, honestly. But a Team G or Torker is never a bad choice on these things at your HP level. Listen to Skip, he knows more on these type of inductions than I do. You're good on the 850!!!!
Many of us run Tunnels, I can list on, but those that run good and run HARD, mine not really included in that last group, are twin carb deals with a lot more to them than meets the eye, and a TAD more power to them. (What is it Ralph keeps saying, his "60-ish Family boat"?)

Ray