Transfer case mounting

[AD&Sons]

Hopefully someone can help out with this one. I'm building a 69 K20 Suburban. The drivetrain is installed, 396 th350 205 case. Couple questions, the transfer case is very close to the floor, my mounts are 1 1/4" tall is that correct? There is a crossmember that holds the carrier bearing, right now I would have to remove that crossmember for driveshaft cleareance. I really think the t-case mounts are too tall. I know I could space the crossmember but I would much prefer to just do it the right way. I'll post some pictures as well.