[slowbubblecar]

I wouldn't go with slowboy. Many people have had bad experiences with them. You could reach your goals on a stock 6 bolt if you wanted to save some money. Why would you want 1600's if you wouldn't need them? You shouldn't be anywhere close to needing them between 400 and 500 whp. I have seen 420 out of 550's. There is no point in running them just because you can. 2.4, 2.3, or 2.0 all depend on what you want out of the car (quicker spool or highter rpms).