[Jack of all Trades]

Your problem with the Olds diesel was probably due to a misadjusted or bad fuel pump. In that pump the throttle pedal moves a fuel governor assembly which in turn controls a fuel metering valve. In effect the driver is not directly controlling injected fuel quantity. If the governor or metering valve were not spec'd and adjusted correctly you could have some very abrupt speed/power changes.

[biblewonk]

Your problem with the Olds diesel was probably due to a misadjusted or bad fuel pump. In that pump the throttle pedal moves a fuel governor assembly which in turn controls a fuel metering valve. In effect the driver is not directly controlling injected fuel quantity. If the governor or metering valve were not spec'd and adjusted correctly you could have some very abrupt speed/power changes.

That sounds reasonable. Sounds like mechanic is one of your trades. How much do you know about Ford 300 6's?