You might try a compression test on the left bank. That'd give you an indication of bent valves. As to mis-adjusted valves, I just replaced 11 broken ball studs (the head rebuilder over-torqued them and the aluminum expansion popped the heads) and am waiting for a back-ordered adjustment tool. The car shakes at idle but smooths out at 300 rpm over. It has a vibration at highway speed when I have to cross town on the I-state. Hopefully, the tool comes this week and I can cure it.
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Gregga
'89 420 SEL "Moby Dick"
'30 Ford Coupe
'31 Ford Slant Windshield Town Sedan
'33 Ford Pickup
'34 Ford Pickup
'01 Honda Passport
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