Bill at Champion told me to stick to the straight up patterns like 212/212, 214/214, 218/218, etc...
Go too big on the duration you'll lose bottom end. Thats what all the guys I called told me.
In thoery yes.. in reality no. Our motors are not cam sensitive like an NA motor.
I'd ditch that converter and get a real one.. spend the money on that
My 130 dollar cam and cheapo lifters are getting the job done.