273 rockers on e-heads
Yeah I called Mike already. A little known thing is that you have to do the relocation before bolting the heads on because you need to clearance for the pushrods. He seemed confident that grinding the rockers would do it, but I didn't have that photo of the valve above to show him either. FWIW he recommended about .035 clearance, which is handy because you can use welding wire for a go/no go gauge.
I noticed in the photo after posting it that it looks like the spring cup isn't in the center of the spot face - but I don't think that can move around.
I'm hoping that working the spring, maybe with a spring compressor, will get the spring where it should be.