Re: Thanks for the help!

[Howard R Pletcher <n9ads@xxxxxxxx>]

There is an IC, which would best be called Improved Circulation, which
did improve the cooling in some areas of the block, but didn't really
increase the overall cooling ability of the engine.  This can be
identified by the coolant tubes running into the block.  The older
version runs into the heads just like a 345.

Since the 5 speeds were built for use in the Loadstar size trucks, they
should be more than adequate for anything you do with a 3/4 ton truck. 
The Loadstar was the primary use of these transmissions and they were a
low-useage option in the pickups.

Howard

On Wed, 11 Jun 2003 01:01:23 -0400 ROCKY LEAR <rockylear@domain.elided>
writes:
> 
> I was talking to a guy here locally who ran IH pulling trucks a few 
> years ago. He claims that there was more than one version of the 
> 392. He says that there was a 392 made for heavy tandem trucks that 
> had improved cooling. Can this be confirmed? I have always ID'd the 
> 392 by the coolant tubes running back into the block instead of the 
> head like a 345 does. Perhaps there were some early 392's that had 
> the tubes going back to the head and later years had them going into 
> the block...hence his comment about improved cooling.
> 
> If I do go with the 392, will the 4 spd. with OD (OD 5th) that I 
> have be heavy built enough for the 4x4 3/4 ton truck? Could heavier 
> pickups and one tons be had with the OD back then?
> 
> Rocky