Car acts funny with the 750, doesn't rap crisply, accelerates lazy. Put the 950 on, in the water box car raps so quick it hits the shift light ultra fast, sounds different even, accelerates faster.
The 750 may need the idle circuit richened up. Perhaps the idle air bleeds, or even the idle feed restrictor on the metering blocks. That might help it rap crisply, but the 950 will still be quicker.
