Engine Swap issues

I finally got my parts car this weekend and was going to rip out the the disc brakes for my duster. My original plan was to stick schumacher conversion mounts in, I had already gotten them. But then i got to thinking, If i rip the brakes off, torsion bars off, and plan on changing the steering box, i'm halfway done pulling the original 360 k member, and it's even got a factory sway bar. I plan on sticking my 360 in with about 400 street hp. will the mounts hold? If thats pushing the limits of the mounts, then ill do the k member swap. if they are strong enough... i probably will do the k member swap anyways, but end up rebuilding everything and pushing off the swap for another year.