im sure a 440 will fit,, ive seen 440s in smaller engine bays then what you have,,the B body rear end will be an easy swap,,,you can buy all the front end parts to rebuild that one,,and you can get dropped up rights to lower the front end from fat man,,, fat man has a rack and pinion kit for the car i believe also,,,or find a volare/mirada/ type front end or a dakota front stub,,,but the factory stuff rebuilt with disc brakes is easy and works well,,,lets see soem pics,,