Cm2100 Stand alone Tuning

I have swapped an 07.5 6.7 into a 99 2500 truck. Engine runs up and down the road without vehicle speed input. But it’s only seeing 70 percent engine load. Any pointers on tuning around this limited? I’ve been playing with getting a vss on the data bus but haven’t been successful yet. Would like to atleast drive it for now with some power. Running cm2100 off the cab and chassis truck I got the engine out of.
 
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