Upgraded engine mount jig to 3/8" rod and trial assembled. all looks lovely. I have two bits of mdf at the bottom to ensure it is all square, a prop on the firewall side to ensure it is vertical, and two dowels to measure the spacing between the jigs at the upper and lower cups, to ensure the right thrust angle. Ready for the welder, other than the fact I want the Lord mounts on hand, to check the actual installation, and any interference with the tubes.