You really didn’t think of what? The W5 head?
There not a popular head and hard to find and that’s why I left them out. YR made there mention to be included. I don’t think they should.
I’ve had my hands on a pair and they are very, very nice. I also like the smaller exhaust valve. While .020 smaller doesn’t sound like a lot, it’s a big deal on that size valve. The exhaust port addresses some of the exhaust issues the SBM has.
On the exhaust valve note.....
Greg made a mention and asked a question on that of which wasn’t answered.
I have a set of the TF’s on the wife’s 360 with a small cam in it now. The idea was efficiency of the cylinder heads smallish ports, high flow capability with a short duration, high lift cam for the street in a low rpm arena.
(Cam @ 226@050 w/.573 lift)