So who is the Valiant answer man here????

It is a 66 v-100 with 273 from factory--Now with 318-- Will want to add power steering--possible power brakes(building car for my daughter) Are headers available???? I heard it gets tight on these early A's??? looking to re-do the interrier -Are door panels still available??? Need front grille work done (small dents), What other year parts will interchange??? Any??? If I pull glass are seals still available???