Well i can say this much, look ont he lectrons and see if they say 36/38 is so they are 36 HV lectrons either way if they have the needles and are setup on alky i would buy them that is a pretty good price.
I am running a set of 36mm HV lectrons on my drag ported 350 and love them.
Now as far as the spacer under your cylinders for the 4mil i dont see why it wouldnt work but i dont think you will see a true gain from the crank in there with out checking the port timing.
But i am not 100% for sure i am still learning on the shee's my self.
But i know i am correct on the carbs...lol
I am running a set of 36mm HV lectrons on my drag ported 350 and love them.
Now as far as the spacer under your cylinders for the 4mil i dont see why it wouldnt work but i dont think you will see a true gain from the crank in there with out checking the port timing.
But i am not 100% for sure i am still learning on the shee's my self.
But i know i am correct on the carbs...lol