yup I think I prefer that as well, but do you drill the mount?
Yes, Put your engine on the mount and mark where the holes should be drilled.
Remove the engine and drill small pilot holes through the mount (Be careful to drill as straight and vertical as possible) at all four marks, change the drillbit to the size your bolts are and drill again through all four pilot holes, enlargening them. (Making these pilot holes first with a small drillbit makes aligning easier than going with a bigger drillbit immediately)
Place the engine over the mount once again, line it up over the holes and push a bolt with washer throught the engine+mount. Secure with nyloc nut and washer under the mount...Done.