If it's both bigger and heavier than you are used to, it will probably fly in similar winds but be a little sluggish. Bigger sail to fly in less wind. Heavier frame needing more wind. The older kites weren't very efficient in the use of sail pressure so I would guess maybe from 12km/h up. Double yes on the #150 X 85 foot lines.
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Sorry to see you did not receive a quick answer to your kite inquiry. I don't have any experience with that particular kite although I have wanted to try some kites from the famous TOTL brand. I would guess that kite would have been traditionally flown on a longer line set, perhaps even 150', back in the day. I would try it on 85' x 150 LB lines in at least 8 mph winds or better. Regular Hawaiian kites have a reputation as loud strong pulling kites. Don't know about the Spin Off but it looks fast. Just get out there & give it a flail. We would love to hear your impression of this classic kite. Welcome to KiteLife. Best wishes to you.
Know Eye Deer, SHBKF