I don't see how any guide plate adjustments can fix that. The rockers are touching and they are off the valve stems.
you might could try some roller tip rockers that aren't so wide. Maybe some 3/8 studs and smaller rockers.

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"Tell it like it is or don't tell it at all" 1964 Falcon 2dr HT, 347V8 4V, dual exhaust, 5sp, pwr assist R&P steering, AM radio, heater with defrost and 2sp fan, electric windshield wipers, cigar lighter, dlx light group, bucket seats, console and full carpet.