HO on a SO motor

jlwelding · May 25, 2009

I have heard a ho will not work on a so is this true? At the sametime a so will work on a ho right?

Mopar1973Man · May 25, 2009

VP44 pumps... Yes this is true... a SO VP44 pump on HO engine is fine. But you CANNOT put a HO VP44 pump on a SO engine.

cummins2k · June 3, 2009

I wonder why this is that the SO pump is compatible with the HO stuff, but the HO isn't compatible with the SO?

Mopar1973Man · June 3, 2009

Best I can say is the timing and fueling software... Something about that... :confused: I don't think there is any phyiscal differences...

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