« Reply #15 on: December 12, 2007 - 07:17:29 PM »
Well how important is vacuum to you , are you using power brakes etc .
the 557 has long duration & overlap & makes awesome power 3000-7000+ rpm but is not street friendly
A vacuum canister might solve that. It helped me.
Logged
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"
2011 Kawasaki Z1000