nailhead numbers

[jbrjohn]

the number on engine block is bH331427
the number on intake is 1375549
Can anyone help me identify?

[Smartin]

1375548 - 63 425
1375548 - 64-66 401 4bbl



I found this here:

http://buicks.net/shop/reference/nailhead_casting_numbers.html

[SpecialWagon65]

The first b is probably a 6, thats the way they looked plus they did not use lower case letters. H is Flint, the rest it the VIN for the car it came from.

On the same surface as that stamp should be some letters like
M R or M T - find that and report back here for more info!
M designated 1966.



MR 401 from a GS
MT 401 from full size car
MW 425 single carb
MX (rare!) 2-4bbl carb

Other letters intead of M:
J '63
K '64
L '65
M '66