subframe connectors for my Olds Omega

[el-camino]

hi,
my wifes car, the 1977 Olds is ready and the engine is strong
now i´m planing to install subframe connectors.
i think, the underbody is the same as a nova from this year.
the underbodys are different from a 2-door and a 4-door ?
exists connectors for a 77 nova or is this my next homemade job ?

the rear 4link kit is from a 1969 camaro, modifications and homemade