42RH / A-500 in a Duster with pictures.

Trailbeast, would it be advisable to convert an A500 to non-LU(lockup)? I have an A999 that I rebuilt with a cheetah stage 2 valvebody and converted to non-LU that I can pull parts from. I'm asking is because I have a 360 that I'm trying to push into 400hp range. Will a lockup handle this?