when you do your pipe clutch and jets you'll need to most likely re adjust the veriater.If it justa little heavy 5.6 might be too much of a jump maybe a 6.0g You may need to go even heavyer than the 6.9 after mods.The pollini kit I got had the 5.6g also.You may want to wait till mods are complete to tune,and keep an eye on your spark plug!