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The engine sensor should only have one plug/tab. The sensor is grounded through the intake manifold and is basically a thermal resistor, the single wire is what goes to the gauge to make it do its thing. The radiator fan switch is also a single plug unit. It too is grounded but through the radiator. The other wire earths out the relay that triggers the thermo fan(s). If you have a two wire unit, it’s for an L series but will still work if you ground one wire - I’m not 100% sure if this is specific to one wire or either wire. If you’ve got this unit your radiator doesn’t need to be grounded. Cheers Bennie

Yep. It was almost 15 years ago, so a lot has changed, but mostly still relevant.

+1 Re-ring and go. EA82 bottom ends are TOUGH........unless it's been starves for oil the crank and block will be fine.

brus brother, Just to go along with this ... I use Map Gas instead of propane when doing the same job. The Blue propane tank torches just aren't hot enough for some rusted fasteners, while the Yellow Map Gas tanks of the same size burn much hotter, and they are fairly cheap as well.