1. The DSE subframe connectors for 1964-68 Mustangs (PN 010105) are built from 1.5x2.5-inch rectangular steel tubing with .083-inch wall thickness. The kit includes reinforcement plates that wrap around the front subframes for additional strength. DSE also makes a kit for ’69-70 Mustangs (PN 010108). At $190, it’s a small price to pay for a substantial increase in torsional rigidity.