67-69 Camaro/Firebird and 68-74 Nova subframes and parts are all interchangeable. there are some differences in the steering linkage parts and some Firebirds used a smaller hole on the upper caliper bracket mounting hole, but if you use all the parts from the same vehicle, it all bolts up.
swap on your Chevelle steering arms, and the spindles bolt directly to any 64-72 Chevelle.
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