800ft asl turbo setup help needed

Hi guys. Well, have ordered a race fuel setup from boondocker with all the trimmings for my 121 D8. I am at about 875 ft in the Northern Mid West and am wondering if I could get some "ballpark" recommendations on tuning parts. IE clutch weights, helixes and gearing. I realize race fuel and low boost are going to be nessessary at my elevation but really have no idea where to start on clutching. Will I need a reverse cut helix from Team to help compensate for lag on holeshot? I am not interested in boondocking or mountain riding but more interested in drag racing (backyard) here in the flatlands. I am really looking forward to this challenge!
TIA for any comments or advice.

Thanks for the response. Yeah, I have the latest update with the new head. I already have a straight 50, so it would be great if that would work ok with the turbo. I wondered if I'd have to try a 46-52 or something like that. Who makes the lightning weights and the 180/290 spring? Any thoughts on gearing? I usually like around a 1.75 ratio on my Polaris sleds but figure I'll be able to try some taller gears with the turbo setup.

I'd like to have a reverse helix to try when I get her going and they are a special order so I'd like to order it now. What kind of duration should I use on the initial angle? .36 or less?
Help me out here guys.
TIA