Cool project! Looks like you have some serious hours tied up in it. I was curious about the cross member mod too. I have seen a lot of members installing the P/B members similar. What does this do for you? Just lower the suspension that much more? Although, I think this style looks good, I really haven't gotten on board with all the bags and lowering stuff yet. I had a 67 short step bed that always looked like there was too much gap between the tires and the fenders.(it needed to be lowered a few inches).
I didn't even know this lowering gear existed for trucks until I ran into this site a few months back.I thought that was only for the impalas and montes out in Cali.......
Keep going with your project!