Is the car carbed? If it isn't, then 190-200 is optimal...below 170 the ecu goes into closed loop and does not read off the mass air sensor from what I remember. If it is carbed, that should be fine, if a little high. I would throw some water wetter by Redline in there to get it down to the 200 max range. If you think it is running hot now, wait until the real summer heats pour on. The last thing you want is for it to overheat.