Anyone tried one of these HEI Distributors?

i got a 6al box & msd dist. an a accel super coil which was on the car when i got it. the manager at the parts house told me to go with a colder plug & gap at 30. along with a mini starter it's been 2&1/2 yrs starts almost instantly. other than the price almost 700 $ for the dist & box i love it. oh he also said to use a champion plug. i tried e-3 which r praised on horsepower tv but didn't want to idle at all. another expensive mistake,almost 50 & for a set of plugs i used 2 0r 3 days. as far as mileage, with 2x4's on a 440-60 10.5 to 1 compression, about 6 or 7 mph . so i've decided to go to a 360 stroker to 408 i figured alittle more hp & less weight