These conversion mounts and billet accessory brackets will fit your selected application-

GM G Body 1978-81 El Camino, cutlass, Regal, Malibu, Monte Carlo, Grand Prix with Gen 5 LT4 Supercharged balancer spacing. 

* Low mount alternator and A/C will not clear

* Must run a high mount power steering bracket, or a low mount power steering bracket with a small diameter pulley.