Bill,
I am with Kix the Liberty is way over kill for what we do and how we do it.
The Tex 101A is your very best bet.. and set up ready to go is under $3,000 with Billet Shifter.
Why pull the motor and Dyno? The Motor is doing well,,, only the trans is hurting you a bit at Maxton,, at Loring and Bonneville the lazy or clunky shifts will not have as dramatic effect as they do at Maxton...
I understand missing Maxton in June to get new trans and shifter in,,, but don't miss Loring.. that 1.5 miles will give you good data for high gear pulls...
Get a Tex and get your butt to Loring in July.
Charles