Bolt through valve covers.

Any one running valve covers like these on a big block with eddie rpm heads? Any tricks to making them work? The long bolts bind in the cover and I cant seem to get them don all the way.
https://m.summitracing.com/parts/MRG-6865BG

I had a similar problem with a set of cast Edelbrock valve covers, #1 the holes weren't quite on the mark with the heads and #2 the Allen bolts were way to tight in the bores, get a ream slightly larger than the bolts diameter, not a drill bit and open up the bolt bores in the cover, be sure to check how much meat you have in the covers before boring them open

Mike

Opening at the bottom be enough or ream the whole length of the tube?

I ended up doing the entire tube/bore