I firmly believe in motor plates.. FRONT AND MIDPLATE with a POLY trans mount.. I've been told about rubber trans mounts contributing to cracked trans cases because of it's ability to FLEX... I have a World products wedge block that is somewhat "stronger" than an stock 440 wedge block,, so I am not concerned with twisting or torqueing like some previous posts... I also think there is NO NEED for a 3/8 plate if you are going to run a MIDPLATE.. A 900HP engine with a 3/8 front plate and NOTHING between the engine and trans is a CATASTROPHE waiting to happen.. ESPECIALLY with a rubber trans mount.. There is FIVE FEET or more between the FRONT MOUNT and the TRANS MOUNT !!!! NOT A GOOD IDEA.... A 600Hp engine could get away with a front plate ( Providing it's 6061 T6,or better 3/8 thick or BETTER ) and a poly trans mount,, but,, I wouldn't try it with a stroker motor !!!