73 Dart Sport and 4 door 73 Swinger parts interchangeable

E7polyhachett said

I've never tried it....... just take into consideration that your 73 Dart Sport has rounded lower A pillar corners, and the 73 Swinger 2 and 4 dr lower A pillar windshield corners are more squared off in the lower bottom, hence there may be some difference in the dashboard frame corners. Like said I never done it, but just a guess on my part. Probably wouldn't hurt to take some measurements of both dash frames. If you had a flexible plastic or paper tape measure would work great. I hope you will figure it out.
Good luck!

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No! This is not accurate in any way. The A-pillars are different, but it DOESN'T MATTER for the dash at all.

The dash frames are interchangeable for ALL A-bodies, from '67-76. You can take any A-body dash frame and bolt it into any other A-body.

Now, the dash and gauge panels themselves have to be matched to the dash frame, so in the OP's particular case if he wants the '73 dash and AC stuff another '73 is the best donor. There are some minor differences in the gauge panel 73+, seat belt warning stuff etc that is different from year to year. But the dash panel itself interchanges 73+.