35 Window, that Comp Cam was the one I was considering using, it also was recommended to me by a guy with a '32 hi-boy here also running a zz4 crate. I was asking about his engine and he said it was a basic crate zz4 and he just changed out the cam and installed roller rockers, ported the heads, he wanted the performance sound and a bit improved performance without sacrificing streetability or investing in a hi-po engine build.