what size cam should I put in a 400 tpi? I have a slp 480 487 cam now so I pluged that to an eng. dyno and then 510 slp cam and only noticed 3 hp wtf more r's but not much more and the hp and torqe curves look the same. and how much lift is too much for a street 400. the 480 487 is just right for the 350.