Do these Cragar's look like drop center type wheels?
They are 1 piece aluminum direct drill so they are different than the originals.
I would like to go back to 15" wheels but I have Viper brake conversion.

pardon the novice Q but what is the drop center? Any chance of a pic of the other side (I'm assuming it is a Viper caliper fitment issue). Here's a BTT for ya since you ain't getting any love on this Q.

That really depends on the back spacing and width. Easy to determine with a ruler.

for backspace flip one over from where it is in the pic & put something straight horizontally across the rim & measure down to the bolt hole area. for width measure across the rim down at the bottom of where the tire bead would seat on each side.

I think the OP is using the wrong terminology, "drop center" refers to the well depth in the wheel rim. (relates to tire mounting)

And, in steel wheels... you can get outers with a deeper drop center area so that you can use (basically) a 14" wheels' center in a 15" outer. (which can interfere with caliper clearance in some cases but not all)
With a cast one piece wheels that isn't really a thing, but the design of the wheel (little hard to say for sure from the pictures) might try and emulate that look for what ever reason and have a smaller center area and a thicker area for the outer.

The original molds for those wheels could have been around for a while and before people were doing various disc brake swaps so caliper clearance might never have been an issue. Might look on their web site and see if they have a diagram showing caliper clearance and wheel measurements if you can't get them just directly from the wheels themselves.

This is what I thought a drop center wheel was, a 14" wheels' center in a 15" outer. Are Rallye Wheels drop center wheels? They will not fit with viper calipers.
I have tried fitting a 15" Weld Draglite and they do fit.
The cast Cragar's have a smooth lip so I thought they might work. Trying to find a old school 15" wheel for my Challenger.

The 15x7s I have, they do look to go to 14" 1/2 to 2/3 of the way in. So I would say, no good for what you need.

Thanks for checking. Search continues.

If you want the Cragar look why not try the original 2-piece SS wheels....they might have more clearance?