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

GM B-body- 1958-64 Impala, Biscayne, and Caprice with Gen 5 LT4 Supercharged balancer spacing. 

* Rear steer cars will require a custom oil pan.

* X frame cars will require a notch in the front cross member to clear oil pan, and a custom transmission cross member.