Brad

Do you have it torn right down? Is it a small journal or large journal crankshaft? The casting number off the crank will tell if it's a 327 or 350. Also, is there a date code on the block? It will be on the opposite side to the casting number.

It has a spin on oil filter I assume?

As Kevin said, it's likely a replacement block. I've read about them but don't think I've ever seen one with that casting number.

As far as it being good or not, I'm sure as long as it was a running engine with no damage it will be fine for what you are doing.

To answer your question about the engine. Yes it is a nice little 327 assuming it's not going to need much work. Is is standard bore? I would be looking at different heads if it has the original heads on it. The "camel hump" heads were far better and are fairly cheep.

I think the only thing thick was the guys head that this quote came from...

I believe all 327's were 2 bolt main, large journal after 67?-69 and small journal 62-67?

Large journal small blocks didn't happen until the 1968 models, with one exception: the 1967 350 which at that time was only found in the Camaro SS.

Small journal 327s used forged steel cranks. When the large journals made their appearance, cast cranks became the norm. Exceptions were high performance 327s OVER 300 horses, in other words the 325 & 350 horse versions (really one and the same engine)

For 1967 the 302 Z28 engines had small journals,  2-bolt mains and forged cranks; for 1968 large journals, forged steel cranks & 2-bolt mains; finally in 1969 the blocks changed to 4-bolt mains. Another way of looking at it was 67 Z28s used a 327 block, 1968 Z28s used early 350 blocks, 1969 Z28s used 4-bolt main 350 blocks (essentially a crank change would make a 69 Z28 into an LT-1 350).

Prior to the factory implementation of 4-bolt mains, the aftermarket offered them for racing (I'm thinking Summers Brothers here).

As was said earlier, the bosses in the Chevy II block had relocated bosses for the clutch cross shaft mount (also relocated oil filter mount). The oil pan was exclusively a forward sump, which also obviously means a diffferent pickup location as well.

All this doesn't mention a word about casting numbers, but it can give insight and a timeline as to what was evolving in small block development.

Elroy wrote:

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hey dave what were the industrial 327's like in the old massey 510 combines ? I know they had steel cranks and different heads but I can't remember if they had 4 bolt mains ??

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         Not sure on that one Elroy. I had to replace head gaskets on a few of those. Rads would get plugged with chaff and overheat. I still get itchy even thinking about that.