I already put a 16cm2 on but it don't spool up to my liking yet I was going to get either a 14cm2 or 12cm2 which shoud I get and My truck is also 5spd and I ain't got too much fuel yet maybe a turn on the fuel screw and diafram turned starwheel bottomed out and smoke screw about 3/4 way down but about to put a turn or two on fuel screw and bump timing but just wasn't sure if I would have growing room with the 12cm2 as in the EGTs or the 14cm2 would be better