You will need the lower valence for a 70, the forward engine light wiring harness. I am not sure if you will need the header panel but I think they were the same for 70 and 71. 70 headlight Bezels and trim, complete 70 grill with parking lenses and trim. and you can buy a mounting hardware kit...
Good info there Learning more everyday. I have a 69 E-440 non-HP that was installed in a 70 model year car and I also have a 70 F-440 that I am currently putting in my barracuda both have a big harmonic balancer mounted externally on the engine.