that is probably me that dominion 410 is talking about, Had a Hein werner with a 4-53 in it, repowered it with a Isuzu out of an 88 gmc forwarder it was a 6BG1 engine, it was a 6 cyl diesel rated at 154 hp also put on new hydraulic pumps at the time they where commirical shear same as what was origonally on the hein werner, i used to run the engine between 1800 and 2200 rpm and never had any trouble with it, started go, real quiet and good on fuel.