would the msd system be good for me even tho i don't hit above 4k usually stay around 3k when I'm getting on it. also i have a couple sets of heads sitting around a double hump and what the guy called "six pack" heads if I'm not mistakin he said they came off of a vet but its been about 3 or so years ago and i can't remember all the details. also have another set think their stock but have to get the #s anyway some info on the heads if you could please.