I just tried with a 220 ohm resistor i had lying around and it worked.
With a cable across the r154 resistor, it's resistance should be only that of the cable. With the resistors I might have to remove, I think i'll put a cable across the resistor in parallel on one side and leave the second Dolby B circuit as it is, to have a comparison. Thank You for all Your suggestions and explanations. So I'm mainly here to learn something new and because this is fun to me. Though i could make a test tape with my Pioneer CT-339, but I'm not sure how reliable that is. So I'm waiting for a testtone tape someone else made. Though the frequency generator is a bit pointless right now, cause i can't trust the kenwood tapedeck fully yet to make an accurate recording. Multimeter, frequency generator, oscilloscope, it's all present and ready to be used. If pin 3 had 580mV at 0dB for the old chip, would that have to be readjusted for the new IC? Also using a soldering iron and solder-wick on 16 pins, trying to get them all loose, is a pain, heh. I also used a desoldering gun to not stress the leads and soldering pads as well as the chip itself.
HOPE FOR THE TAPEDECK INSTALL
I did install a socket, thinking it would be easier to put the new chip in, which it wasn't, and also to be able to swap back to the old chip, if needed.
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