Too high I agree. Bottom Bar I would go Bottom hole on rear and dead level to the ground to whatever hole gets you close on the forward crossmember. Top bar top hole on rear and go 2 holes down from parallel on the crossmember. That puts you at a start of Instant center length at almost exactly half of the wheelbase. With you numbers and some of my factors i come up with 544.627 pounds of transferred weight. That means that with the Front/Rear weight percent you gave, there now is 202.477 more weight shifted towards the rear during transfer.

I would also set your shocks to the softest possible for the first time out. Soft rebound (extention) and soft bump (compression). This allows you yo determine what the suspension is doing without the shocks masking it. After you get the one hit you will know what it's doing hopefully by watching some video that a friend to be determined will be doing for you. Then you can change the shocks to control or change anti-squat