My cam cover sprung a leak (94 3.2L) so with 94K miles I thought I'd go ahead and do the valve adjustment and plug wires at the same time I replace the gasket. What's the best source for the shims, wires and related parts? Local Ford dealer talks a lot about NLA shim sizes. I'm planning to wait 6 months or so to do the timing belt, water pump and so on. Thanks, Walt Greenwood Everett, WA