Big Inch Smallblock

B3422w5 said
Never seen a W5 head go remotely close to 355. For one thing, they flat aren’t big enough.
I can say this for sure, even a good W5 head is more than used up with a serious effort 4 inch crank deal. You need go no longer stroke on anything like that. Those heads were designed for stock stroke 340-360 mills. Not 400+ inch stuff.

I hadn't either until today. Brett Miller has been working on some preliminary W5 work with intentions of having a new casting done. Last week he was looking for Virgin W5 head castings. By Wednesday already had some and 2 day's later had a finished port going [email protected] which is already more than I've seen and better than Indy CNC -1/-2. I'm sure with a better casting without the deep spring pockets plus other fixed areas this will be a wicked head to make some steam. Hope it works out.