Quote:
I had the front end rebuilt with a kit from Kanter when I first bought the car so I believe the front end is good.
That
should rule out front-end control arms as source of your "porpoising" problem, then.
I'd be more concerned about the needle bearings that the load arms pivot on. In the absence of a factory-trained dealer network, the grease fittings for those bearings are often overlooked in a lube job. See Figure 39 in the Suspension and Steering section of the shop manual for location of that fitting for front, Figure 41 shows the rear.
Perhaps before you tear into or order anything, you should try pushing some grease through these bearings. I wouldn't be surprised if whatever grease is in there is awfully stiff.
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