[low au classic]

hey all you cortina drivers and lovers
just had a few questions that i hope you could help me with as i am a new owner of a 1973 tc cortina

- how does the fuel tank fasten to the car i have the straps which slot in but how do they bolt in?

-the chrome trims on the door seal exterior how do they go on once they are off the rivets seem broken

-what heter box will fit in as mine is cracked like the rest of them can you fix them up like fiber glass the cracks and re spray or does a te tf one fit

thanks all that can help me out