Sub connectors for 1964 Plymouth Valiant

Cool. Yea im looking at that one. I will be pushing 450hp and i want to reinforce my 64 as much as possible. When i looked at this kit. I didnt see an option for 64 to 66 ?
They used my car to prototype the kit

USCT1M1037-Level 3 Chassis Stiffening Kit 63-66 A-Bodies Ply