head milling

Cuda416 said

Alright, drawing this relationship up in a cad program shows me what @66fs was talking about. I like that way of lining things up way better than having to cut intake manifolds. Looks like it allows the intake to drop lower and have the ports line right up.

Thanks @66fs

Click to expand...

You don't need to thank me, those numbers came straight out of the Chrysler Racing manuals. I've milled 340 J heads and 273 heads (920 casting #) and their numbers are spot on, including chamber cc's. In my experience, the bottom of the intake does not come close to the block. I usually only mill heads .040 to reach minimum NHRA chamber cc's. Except /6 heads which are stand alone so there is no relationship to worry about.