it isn't so much the lumps, but more knowing porting is done right and rest of head is 100%. have had concerns from the day I bolted it on. while tuning, I noticed vacuum flutters 18-20 at idle. valve or guide? bar stool builders all say high lift cams do that, multi carbs do that etc. etc. just want a pro to check it out before I start throwing money in other directions. the Clifford is pricy but I can get a few bucks back from the current set up. still think it can take more cam but hesitant until I here what others are using. tom would be my first choice on head work if he is interested.