72 k10 big block engine fitment issues

[dieselfuel007]

i have 72 k10 that i'm installing a big block in with a diy4x engine crossmember and i'm having several issues first the crossmember seems racked when i bolt it together and try to fit it to the engine while its on the stand called diy4x they keep telling me there is nothing wrong and make it work second i ordered sanderson bb8 headers and they hit the driverside of the mount so i called diy4x and ordered taller engine mounts has anyone else had these issues i ordered both of these to not have issues and am having issuse with both and neither were cheap just looking for some solutions if anyone has one