well what you see everyone buying on the net and is a bob boyce set up is not the one that he acttually uses to accomplish this he has a totally different controller that is fully adjustable from 0 to what ever duty cycle and the frequency are what ever you want them to be cause it is all set with a microcontroller that can be changed by your pc as of now their are less than 20 of them in existance
that is also another reason why people dont replicat his set up
i dont know for sure if it will run a 350 chevy but i have bought one of the hex controllers and am planning on trying it to see