Have a very early VIN "1000xx" (if that matters) '70 Barracuda that came to me many years ago with a '72-'74 grille and lower valance. I can't blame the previous owner...we're talking mid '90s here so there weren't a lot of budget friendly options.
I'm getting ready to spend some coin on the car now and would like to go back to the correct setup. What am I up against? Past experience tells me that the screw holes in the headlight surrounds don't all match up to the fender but beyond that I haven't dug into it much. The car is about 2 hours away.
Thanks!

header panels are different from 70 to 72,you will need a 70 header panel to mount the 70 grille back in,good part is all parts are reproduced,just cost.the lower valance is the same,you will need just the 70 plastic insert

Wow! I used to own 100327 that was a 70 with a 72-74 grill. Car was Panther pink. Same car? I had to notch some of the sheet metal in front of the rad to allow the grill plastic to fit. I remember the headlight bezels weren’t exactly perfect either.
I bought the grill for $150 (NOS) back in 1994 when 70 grills were going for $800.

Nope, this is earlier than that.
I was at a Mopar show back then where a restored '70 grille was going for $1500 FIRM. Main grille assy. only, no lower valance.
***Correction: The show I attended would have been early 2000s.

Yeah, remember when year one had NOS 72+ grills for around $150. I still have one, never been bolted on. Im not certain if the headlight bucket area will be the same as a 72+ vs 70. Both single headlight but you know how 70 is unique everything so I would look into it.