Here's the 19701 K-Frame numbers

10   #2962010 Crossmember (K-Frame) 225 Engine
12   #2962012 Crossmember (K-Frame) 318, 340 & 383 Engines
14   #2962014 Crossmember (K-Frame) 426 Hemi w/ Skid
52   #3583052 Crossmember (K-Frame) 318, 340, 340 T/A & AAR, & 383 Engines
70   #3583070 Crossmember (K-Frame) 198 & 225 Engines
74   #3583074 Crossmember (K-Frame) 318, 340, 383 & (440 w/ Skid) Engines
76   #3583076 Crossmember (K-Frame) 426 Hemi w/ Skid
77   #3466477 Crossmember (K-Frame) 318, 383 & 440 (440 w/ Skid) Engines