September 2015, I purchased a sub-frame connector set (p/n ART-20) and 4-piece torque box plate set (p/n ART-08889) from Auto-Rust. The six pieces cost me $488.90 (after freight). To be honest, I hadn’t gotten under the car yet (in last 4 years) to see how the pieces fit. I did have to wait about 3-weeks for pieces to be made. The cardboard box the two sub-frame connectors had split open (shipper fault, not the boxer), but other than a minor scratch – no harm to parts.
FYI, the p/n ART-20 is same part number for 2 and for 4-door cars, but length is different. You need to specify which one you need. The torque boxes should fit either 2 or more-door cars.
All 6 items appear to be well made – but the true test is to get ‘em installed and see how they fit. It might take me another few years to get r done, for I also have firewall welding (adding A/C), transmission tunnel modifications, and other things to get done at same time.
If they fit (which I suspect they will), I most likely will be buying another set of subframe connectors from them.
The torque box plates appear to be overpriced (IMO) for what you get. I might be fabricating roughly/sorta similar for the other car to stiffen its frame up. No, I won’t be coping them or even using them as a template. I was thinking about on the other car, to use a bit thicker (maybe) steel, but just (extensively) boxing it all up after I get the subframe connectors installed.
BudW