Zex jets are not the same.
The 75 shot for NOS is 54 N2O, 67 Bypass
150 is 67 N20, and 42 bypass.
You can do the math in between to figure the other out.
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1988 Mustang GT
11.8 @ 123 (7/14/01)
11.5 @ 120 (9/14/01)
1992 BadAzz Wrangler
1993 Explorer
See my car at:
www.mustangworks.com/cgi-bin/moi-display.cgi?179