Can the push rod hole size on the TFS215 heads be opened up a little to make sure larger pushrods dont hit? I have 5/16x.105 now. They seem kinda close already. I know people say that a 11/32 or tapered 3/8 will fit but If the heads are off already why not open them up. How far can you safely go?

 

The difference between 11/32 and 3/8 is 1/32 or .031". I'm sure it is more than safe to punch those holes out that much to run 3/8 push rods.

 

I was under the impression that the TFS 215 heads were set up to run 3/8 pushrods from the start.

 

That's what I heard also. I just want to make sure they clear.