Todd, my combo is very similar to yours. I'm running a 498 with 310cc darts, hydraulic roller and 9.5-1 compression. My guess in hp is somewhere around 600. It is minitubbed but I'm only running a 295/18 kdw. Basically I just dont want to buy twice if I can help it. I also looked at the centerforce df with the 12in clutch. I have to find out if the 12 in will fit in my lakewood bellhousing.
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