Here is one on eBay...
1960 - 1970 Dart Lancer Barracuda Valiant strut rod bushing Moog K355 | eBay
Last time I did one I put some lube on the frame, put bushing in the best I could, washer, nut (didn't force it, just till it was on) drove around the block, could dips, couple speed bumps...