73 door cards will fit 67-73. From 74 on, the top edge of the door cards are different because there were no front quarter windows from 74 on. The card skin styling changed in (IIRC) YM 72 but the shape is the same.
Rubber boot mats were the norm in 140s, many 164s tended to have boot carpets. Most of the used rubber mats I've seen from 140s look rough. GCP might have replacements but I haven't checked.
The boot floor shape changed slightly in YM1974 (when the fuel tank was relocated) to be the same as 240 75-93. A 240 boot carpet might fit in a pre-74, but it won't be 100% perfect.