I know the drive line is not 1948. I think its from a 1956. So is this the crossmember that gets in the way?

I want to replace the master cylinder, and add a power booster. and KEEP my DRUMS all around.

It looks to me like there's gobs of room under there, but I've read that some trucks might need to modify the transmission crossmember.

This crossmember is at the bellhousing. So am I good to go? Or am I making a big mess?