In the middle set of holes, the mounts lined up fairly well to the stock 4 cylinder mounting holes.
I turned some solid bar down and drill a clearance hole for a 3/8 bolt. This fit in between the ears of the new mounts. Using some 1" x 2" rectangular tubing, I welded the standoffs.
These ran down to the stock crossmember, fairly close to the original holes. It did take several tries to achieve the proper angle.
With a foot welded on and several holes drilled...
...the front of the motor was bolted in. I do plan on adding some additional support to the mount so that the feet can't bend, but I want to get the headers built first to make sure there enough clearance.