Bill,
Good start with that chassis. Still some setting up to be considered per our conversation. Get the rear wheel mounted and set in the center of the adjustment range. Install the frontend- check the stiffness of the forks- you want them very firm with little or no travel. Put a dummy motor in the frame, and install the sidewinder with proper bracing on the meg. Air up both tires; the front at 30lbs, the rear at 8-9lbs depending on the footprint when you actually sit on the bike. Install the Tracy body in the correct position. At this point, check your ground clearance- you want the bike as low as possible but you must meet the 2 inch ground clearance rule for any component on the bike- don't fudge but maybe leave an inch or so to work with, say 3 inches. Slide the fork tubes up or down to get the right clearance. I'll explain later how to internally stiffen and lower the forks so none of the tube is sticking out of the top of the triples(there are rules about that too). Use a set of handle bars that allow you to lean as far forward as possible- flat z bars will be perfect but straight drag bars might be fine. Remember, on a wheelie bar bike, you need to position your body in a forward lean with your head down when launching the bike. Your arms should slightly bent and down against your side. If you try to leave the line sitting up straight with your arms extended- the will bike take off and leave you sitting right where you started because your body will be snatched backwards and those extended arms and vertical spine alignment can't overcome the force from that slick hooking and the bar hitting the ground at 7500-8000 rpm's.
Once you've got the body on, the handle bars mounted, tires aired up, right ground clearance sit on the bike, lean forward, head down with your arms slightly bent but down by your side. Now bend your legs backwards to the point where your toes are on the ground but your heals are elevated. Make certain you feel comfortable in this position as this is where you will install the foot pegs to be able to launch the bike at full throttle. Those pegs must be set so they will lock your body in place- take time getting this right. This bike is only being set up for you. Have your welder placed the pegs in this position with adequate bracing- a good deal of pressure will be applied when the bike takes off.
Once the bike is made into a roller, you can determine the wheelbase and move on to selecting which set of wheelie bars to use. Picked a set that closely matches the wheelbase of the bike. Get the welder to gusset the mounts well because those bars become your only life saving device once the bike launches. The bars should also be properly braced and rigid. The adjustment hiems should be in like new condition with no slop. The centerline alignment of the bars to the chassis should be perfect- no bends or curves to the left of right. We'll discuss further adjustment of the bars once you've completed the bike and prior to the maiden voyage.
I'm out!!!