W2 heads on a 318

I like the long replies ha, gives me stuff to think about. I don't know if the 318 will do the 550 hp range, I guess it's possible. It ran mid 12s before, traction was an issue with street tires, but I backhalved it and put a 4 link under it with tubs so I can put any size tire on it I need to make it hook. It'll mostly be used for speed thrills on Friday night at the strip and beer runs ha. Not a daily driver. I'm not worried about the fuel costs.
I started buildingthe car when I was in high school and drove it for awhile. I'm in a spot now where I can work on it again and just looking at my options.