Howdy, been thinking about setting up nitrous on my gsl-se streetport 13b and had a couple of questions on the jacobs nitrous mastermind box. I have noticed that they have two different part numbers for four cylinder and 8 cylinder models. If I have read right, the four cylinder and 'twin rotarys' fire every 180 degrees of crank rotation meaning all the settings on the mastermind as far as timing retard and window switching would work correctly between the two like normal correct??