428 block & heads-worth building?

66COUPE said:

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Hi Goats, I recently received a 428 block & heads from a lost friend’s wife, its been apart for decades in the corner of the garage, doesn’t look the greatest but my question is how much surface rust is too much and would it be salvageable. Here’s the codes on the block: 114979 YH date l178 29P122362
Heads # 48 dates l268 & l269
Some pics for reference

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lust4speed said:

Heads are definitely 1969 but the YH code 428 would be 1968 block. Did you happen to note the block casting date by the distributor? One of the photos shows that the caps are not on the block and wondering if you found them? Not the end of the world if missing but will add to the build costs finding either an original donor set or a billet aftermarket set and either will require a line bore. Original caps should be 4-bolt on a YH block which would be great. 428 blocks were some of the beefiest blocks Pontiac produced and as Jim said, looks like no core shift that plagued some of the later 455's.

Not a big fan of 46 heads, but a nice set of aluminum heads would make that shortcoming go away.
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O52 said:

Dated Sept 17, 68 Mick

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66COUPE said:

Thanks for the replies, so block & heads all dated from September 68, then they all would be for 69 production? or considered as 68 ? Thanks !

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lust4speed said:

Heads are definitely 1969 but the YH code 428 would be 1968 block. Did you happen to note the block casting date by the distributor? One of the photos shows that the caps are not on the block and wondering if you found them? Not the end of the world if missing but will add to the build costs finding either an original donor set or a billet aftermarket set and either will require a line bore. Original caps should be 4-bolt on a YH block which would be great. 428 blocks were some of the beefiest blocks Pontiac produced and as Jim said, looks like no core shift that plagued some of the later 455's.

Not a big fan of 46 heads, but a nice set of aluminum heads would make that shortcoming go away.

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lust4speed said:

Heads are definitely 1969 but the YH code 428 would be 1968 block. Did you happen to note the block casting date by the distributor? One of the photos shows that the caps are not on the block and wondering if you found them? Not the end of the world if missing but will add to the build costs finding either an original donor set or a billet aftermarket set and either will require a line bore. Original caps should be 4-bolt on a YH block which would be great. 428 blocks were some of the beefiest blocks Pontiac produced and as Jim said, looks like no core shift that plagued some of the later 455's.

Not a big fan of 46 heads, but a nice set of aluminum heads would make that shortcoming go away.

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66COUPE said:

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66COUPE said:

Thanks for all the input, I’ll get a better look at everything tomorrow and wire brush the head numbers, couldn’t tell if it is 46 or 48. Should I wipe or spray everything with motor oil or is there something better for protection ? till I can get it to a shop. Thanks ! I’ll look at that crank too, it was laying next to the engine so I grabbed it, could be from something else. There’s another Pontiac block with attached heads but it’s been outside half buried in the ground for who knows how long, I might get a better look at it soon.

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66COUPE said:

Well the old goats are again correct, that crank & caps are not from that block, would they be of use to anyone ? and it’s a 1968 428 block # 9792968
& #46 heads, if I build it would 4 bolt mains be necessary or even possible on this block? Here’s a pic of the area, there are holes with short studs, can they tap those holes for bolts ? View attachment 161140

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