Stock Single Piston Caliper vs Viper 4 Piston Caliper

Jimacuda said

Check your clearances on the pin type caliper brake line fitting. It likely will not clear your lower control arm.

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Have'nt heard that before in all of the disc brake swap stuff I have been reading. Were you using the correct caliper? Late B-bodies had the brake line fitting in a different spot compared to all of the other pin type calipers.