just i thought that i had after i sold my 64 1/2 convertable, i was thinking of building a 66 fastback with a 302 efi engine, 4 speed auto & a au falcon rear end ( IRS ) with A.B.S.
this would be a little easier for you in U.S.A. as there is a heap of mustangs there with the ideal I.R.S. that you could use, may be easier to buy a wrecked late mode mustang & source all the mechanical from that, you would have the late model driveability & the early model style
dont think you could beat that
the toes that you step on today may be attached the the legs that hold up the a$$ that you may need to kiss tomorrow