need to know within the next hour!

[Rick 91GT]

Most kits I have seen or delt with have a 40psi or a 50psi setting...

It is important, In the higher HP settings if your too rich or too lean you can pull the crown up on the top of the piston, and ruin the motor.

I would start at 40psi vac off and see how the plugs look you should be fine with 10-12base timing. If you go to the 100 shot go to a range colder plugs. If your Holleys take #65 w/ a .040 gap go to a #64 .040.

Check out page 7 of my site I ran the Holley kit as well, 175 shot, 15 degrees base pulled out 5 degrees right before N2O came on, 1 range colder plug gapped at .035". Read the plugs right after you spray to get a correct reading. I suggest making some small pulls, 330ft, 1/8mile before you spray the entire 1/4 mile.