What goodies do I need to build a Fast slant 6

Now my brain is foggy, but I'm remembering an 11 second 4 cyl '62 ??? Pontiac that used to run at our strip. Maybe '64, can't remember. But it was a factory 4 cylinder car, like a 389 using only one bank. Just bought 1 aftermarket head, used on header, etc. He got the car to go 11's N/A. Where there is a will, there's a way. Certainly there could be some hope for the N/A 225.