Quote:

27p0930-340-6
2b117718 or 6

Front of block
72 HM 340R




27p0930-340-6 ("p" is an 8) = 340 block casting number

2b117718 or 6 = VIN sequence number


72 = 1972 Model year
H = 1972 model year
M = Mound Road Assembly Plant
340 = CID
R = Regular Fuel

You left off some numbers on the front of the block, 72HM340RXXXXXXX?