Well okay guys going to SOhC 4 a sec, I know this aint worthy to ask in a thread talking about H-series/B-series, but if i put a Y8 head on my Y7 head will that last more than 50,000 miles, because i hear it will last a long time? Also arn't D-series interchangeable

I want V-tec
and B-series
or H-series