I think the LC birfs are bigger then the mini truck ones. Should hold up for awhile. The r151 should hold up ok. The trans is basicly the same ones used in the supra's and they are making some big power. I think this will be a sweet runner when your done. I considered running the 5.0 in my runner but I wanted to keep it all toyota. Can't wait to see some progress.
As far as I have read the birfs are the same size in 40, 60, and Mini truck. The only difference looks like spline differences. I think.
I plan on havin a BA rig when all is said and done. I wouldnt mind running all Toyota but, I can't really beat a free 302 haha. I really can't wait to start working on it.