I ran the 30's and had no problems and I also ran a 150 shot of NOS (dry).
The 24's should be fine with your set up but if you plan on adding more power then I would go with the 30's and just run less pressure for now and the computer will cut back the duty cycle a little more with the 30's. There is a guy here in town with almost the same setup as mine but with 24's and we raced one night and we were side by side until I hit the nos.
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James Cox
nochevy@hotmail.com
1991 Mustang LX
12.565 @109.38mph 1.764 60ft