Trailing arm crossmember with No Limit Arms

[SCOTI]

My bet is the spacing for the front T/A mount (front/bushed part of the actual arm where the bolt goes through) is the same.

The physical brackets on the aftermarket x-member vs a stock x-member are different as pointed out. Most of the aftermarket x-members are flat (w/angled bracket) where the OE x-member was @ an angle (w/a straight bracket). That being said, as long as that front mount is the same dimension to fit within the bracket, any aftermarket x-member should work.

Also, an FYI for those that might not know... There are bolt-on exhaust pass through kits for OE x-members as well. This is one of the examples:
https://www.holley.com/products/exha.../parts/ECOB072