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I figure you've got two ways to approach this: (1) do it right, systematically tracing the low-voltage and high-voltage coil circuits until you've found the faulty component, just like in auto-shop class; or (2) take a gamble on a quick-and-dirty fix on the off chance that you'll guess right the first time.
I'd go with the gamble -- if it doesn't work, you'll have to go back and do approach #1 anyway, so you might as well try the easy one first. So here's what you do:
Wipe clean all the high-voltage wires, then give them a spray of that ignition-dry stuff you can buy in auto parts stores. Now try firing it up. If it doesn't work, well hey, all it has cost you is a few minutes and a can of drying spray. If it does work, you've saved yourself a whole afternoon, which you can instead spend putting on a new set of plug and coil wires.
My theory of what happened is this: The coil, coil wire, and half the plug wires are on the water-pump side of the engine, and undoubtedly some of these got sprayed when your hose blew. As you say, the car started up OK immediately afterward -- but my guess is that some of these wires weren't in such great shape, so while the car was sitting in your barn for a week, the stuff was soaking in through little cracks and stuff in the insulation, so the next time you tried... pfft.
If that doesn't work, then you're stuck doing it the right way. Big parts shops should have a coil tester, and you can always temporarily replace the Pertronix Ignitor with an old set of points if you want to rule it out as the source of the problem.
Good luck!
posted by 68.227.170...
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