i would do something like the morrison center frame kit
www.artmorrison.com page 13 of the pdf catalog. as for the motor mounts... im not familiar with the block mounts, but i would "assume" a plate with "ears" that bolts to the block, then a captured poly bushing in a tube sleave (bolt thru ear>>bushing>>ear ) the tube sleave then attaches to the frame....via a triangulated pedistal
hope that help a lil