Do you mean the head? Gotta take the head off and see what valve sizes you got. If u can weld make an intake from 7/8” ID about 3” long it’ll help the low end.
I don’t remember what a WHIZZER looks like exactly but if it’s a small intake adapter you can open it up or replace it with a custom intake. If it’s head work well you just gotta make sure there is enough meat where you wanna open it up.