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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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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
Sorry screwed up the head dates
l1268 & l1278
 

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It's a '69 360 HP 2 bolt block with the small valve heads. I had the same thing once upon a time. Looking at the lifter bores, it looks like a great casting with no core shift, and the cylinders don't look ridged and look like they may be standard. Definitely worth a trip to the machine shop to verify, but looks like a solid core to rebuild. 428's are pretty rare these days and make a good base for a street performer.
 

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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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Discussion Starter · #8 ·
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.
[/QUOT
Dated Sept 17, 68 Mick
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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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 !
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.
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.
Thanks Lust4 got this with it looks like 1 cap is MIA , I think the heads are #48 dist date is I178
 

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Looks worse than it is. A machine shop will hot tank it and then magnaflux it for cracks. The go from there. The cap missing is the rear main. Butler Performance Pontiac sells them, but any replacement will require that the mains be align honed to make sure the tolerances are at spec. Even if you find a cast iron replacement, you will still want to align hone the bores.

September 1968 makes it a 1969 model year. I suspect the block is drilled for 4-bolt mains? If so, you could add aftermarket 4-bolt main caps and have the bores align honed.
 

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Sorry, I missed both the block date and the fact that there was a YH in 1969 as Jim pointed out.

Okay, I might be really loopy tonight, but neither the crank nor the caps are anywhere near being for a 428 Pontiac. They just don't make that big of hammer to beat it in place, and I swear the only thing I've been drinking is coffee. I couldn't find 428 photos so I'll make do with a photo of 3-1/4" 455 crank and caps. The above photos in post #10 look like something for a 4-bannger engine consider the narrow width of the rod journals and the small mains (and thrust is on #3 on that small crank).
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Discussion Starter · #14 ·
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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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.
i would spray pb blaster or wd 40 then wipe down with oil or trans fluid.im sure there are better options. this is one of many.
 

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Discussion Starter · #18 ·
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 ?
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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
the aftermarket caps are drilled in two bolt blocks all the time.those other holes on your block are for the dowels to locate the caps. two bolts are pretty stout but if you cant find the original caps. the new caps may be the way to go.
 
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