440 vs 440 HP

[Dart14]

Lost my notes - What are the differences between the 440 engine vs the ones stamped with HP on the pad by the distributor. Crank, Heads, compression, manifolds ? I thought the valve sizes were the same. I am looking at a 1968 block supposedly out of a Fury. No HP stamp. It does have the maltese cross .010 which I believe refers to one or more undersize main bearings. Also looks like 440 F - Engine plant designation maybe? Thanks.
As usual - a day late and a dollar short.

[dave571]

All the BB's had 906 heads with 208 /174 valves in 68. Also all had forged cranks.

Main Differences were in the cam and manifolds, as far as I know. dual point distributor, avs carb, blah blah blah.

If doing a rebuild the hp block is no more desireable than a regular one.

[rumblefish360]

Then again, once you open it up to work on it to build it up, it won't matter any more.

[cageman]

Do the hp's have windage trays too?

[zij576ca]

I believe the HP engines came with windage trays, yes. The 'F' stamped on the ID pad referes to the year the block was put in a vehicle. 'F' equates to 1970. You can cross check that with the casting date on the left side of the block. Blocks cast in the early to middle of the year could be used in the year cast or the next...

Addendum: From http://www.autohobbydigest.com/t_blockid.html

"For Engines made begining in 1965, again the first character indicates the year [ A B C D E F G H J ] for [ 1965 .. 1973 ] (in set order). The full CID displacment will follow. If a dash and three numbers follow, this indicates the date it was stamped (not necessarily cast). Some of these engines will be stamped with an HP indicating that it was destined for a high performance application. Likewise, a L or LC would indicate a low compression engine. This isn't an either/or relationship. A block might not have either an HP or an LC. And not all block that wound up in high performance applications always got a block stamped HP."