I run a front motor plate on my MP Megablock without any midplate or engine limiters. I run a standard transmission mount and solid motor mounts.I bought a mid plate from S&W but did not have enough room to install with stock firewall,inner fenders and chassis. Have been doing this for the last 6 years without any problems.
B body 3600 lbs.,572 motor mid 9's with 1.30 60 fts. Best of 8.62/161 mph with juice! It does leave HARD and has not broken anything yet. Probably 400 + passes!
Mike