Another "Will these fit?": 18" Mustang wheels
With the center bores, unless the rim is quite thick you'll need to bore it all the way through. On my car I made my own center caps, you can see they have to be pretty tall because the hub actually comes all the way through the rim (although the Enkei RPF1's are pretty thin at the mounting flange). I cut the end off a slip through center cap and epoxied the matching cap to the rears into the slip through piece
Machine work, bored vs stock. The RPF1's start at 73.1mm but neck down to a 65mm cap. I had them bored straight through at 73.1mm
No cap, you can see the hub fully protrudes from the rim. These are DoctorDiff aluminum hubs, but they're actually a little smaller than the stock 73+ Mopar hub...
close up
The fix- used a push through cap Ultra Wheel Center Caps 89-8059S , cut it down to the right height and epoxied my snap in caps into the end.
In the front I'm not sure you're going to get a 275/35/18 in there on an 18x9 with only +24 for the offset. MopaR&D was going to run 255's, and that makes a big difference. I run 275/35/18's on my Duster, but the 18x9's are +35. My 13" disks add about +5 compared to the 73+ BBP disks so effectively that's about +30mm of offset for the 275's if you're comparing to a 73+ disk set up. I started out with the fender lips unrolled, but as my car has gotten lower I found I needed to roll the fender lips to keep them clear. 5-6mm doesn't sound like much but it's more than enough to go from clearance to rubbing. Lowering the car about 3/8" took me from ok to rubbing without the fender roll.
What have you done in the back? Because the 295's aren't going to fit a Valiant with the stock spring locations, especially a lowered one. Even on my Duster with the 1/2" spring offset I had to take almost another 1/2" out of the quarter lip. And Dusters/Demons/Dart Sports have about an extra inch in the rear quarters compared to Darts and Valiants. 295/30/18's have an 12" section width, so, if you don't have 13" from the spring to the quarter lip it's not going to work. My '71 Dart only has a little over 11" from spring to quarter lip with the stock spring locations. You can get up to about 12" with a 1/2" offset and some quarter lip trimming, but that's zero clearance. I know Valiants have a little more room because of the higher wheel opening, but unless I missed something I really don't think a 295 will fit without a mini-tub or extensive quarter work.
With the center bores, unless the rim is quite thick you'll need to bore it all the way through. On my car I made my own center caps, you can see they have to be pretty tall because the hub actually comes all the way through the rim (although the Enkei RPF1's are pretty thin at the mounting flange). I cut the end off a slip through center cap and epoxied the matching cap to the rears into the slip through piece
Machine work, bored vs stock. The RPF1's start at 73.1mm but neck down to a 65mm cap. I had them bored straight through at 73.1mm
No cap, you can see the hub fully protrudes from the rim. These are DoctorDiff aluminum hubs, but they're actually a little smaller than the stock 73+ Mopar hub...
close up
The fix- used a push through cap Ultra Wheel Center Caps 89-8059S , cut it down to the right height and epoxied my snap in caps into the end.
In the front I'm not sure you're going to get a 275/35/18 in there on an 18x9 with only +24 for the offset. MopaR&D was going to run 255's, and that makes a big difference. I run 275/35/18's on my Duster, but the 18x9's are +35. My 13" disks add about +5 compared to the 73+ BBP disks so effectively that's about +30mm of offset for the 275's if you're comparing to a 73+ disk set up. I started out with the fender lips unrolled, but as my car has gotten lower I found I needed to roll the fender lips to keep them clear. 5-6mm doesn't sound like much but it's more than enough to go from clearance to rubbing. Lowering the car about 3/8" took me from ok to rubbing without the fender roll.
What have you done in the back? Because the 295's aren't going to fit a Valiant with the stock spring locations, especially a lowered one. Even on my Duster with the 1/2" spring offset I had to take almost another 1/2" out of the quarter lip. And Dusters/Demons/Dart Sports have about an extra inch in the rear quarters compared to Darts and Valiants. 295/30/18's have an 12" section width, so, if you don't have 13" from the spring to the quarter lip it's not going to work. My '71 Dart only has a little over 11" from spring to quarter lip with the stock spring locations. You can get up to about 12" with a 1/2" offset and some quarter lip trimming, but that's zero clearance. I know Valiants have a little more room because of the higher wheel opening, but unless I missed something I really don't think a 295 will fit without a mini-tub or extensive quarter work.