LS427 engine cover options...

[roguegeek]

So I haven't done a LS7 but on the LS3 covers they clip onto the fuel rails and the studs on your valve covers (2 on each side) fit into recessed ports in the coil covers. I think you will need to change your fuel rail fitting from the 90 to a straight like on my LS3.
The profile of the LS3 intake is different than the LS7 intake. So I can't say if the LS3 coil covers will fit or look right.
In regards to the 1/8" strip. I cut it to fit and then taper the underside of the 1/8" on each end so it fits the end of the cover taper.
To hold it on the cover I drill and tap the 1/8" towards both ends for 6/32 bolts. Drill and tap the 1/8". Buy 4 6-32 set screws. Screw them in almost all the way. The tack weld them so they won't turn. Then body work the 1/8" so its perfectly flat. Paint and add the graphics.

Came out looking good. Yeah, I figured an LS3 cover would probably need to be modified to fit the LS7. If I find some cheap ones to play around it, I'll go ahead and try it. Thanks for the feedback.