you will never get a S400 to lite with a 12v on the street with what you got to work with. run the 35 you got and save for the twins. the biggest you would what to go on your set up is 62/65/14 or 62/71/14. my 96 has a 215 pump,4k spring, cut dv's,holders, #0 plate,370's and for a turbo, a 62/71/14. it lights OK, egt's stay good when pulling my gooseneck(14000lbs) boost get to 53 to 56psi. but i have a built auto with a lose converter to help spool it up. with a 5 spd it will be a little hard to keep a big turbo lite on the street.