That is a DR 1114429 (correct for 1970 440+6/70-71 Hemi and 71 340), that somehow was assembled with a hex head plunger. Normally the 429 has the round head plunger. Highly unusual! The 1114420 (hex-head) is for 69, and the 1114443 (hex-head with cap) is correct for 440+6 in 71.
