Building an engine for someone, and I am attempting to install EC's fantabulous roller rockers on a 33 head, and I noticed that there is a .200" difference in height between the 33 head and the 31 heads' rocker stud bosses, leaving a large gap between the bottom of the roller rocker mount to the stud boss on the 33 head. The 31 head accepts the mount perfectly, with the bottom of the mount reaching the floor and touching the stud bosses. You can mic the floor of the valve area between the two heads and that is where the difference is. Total head height, etc are all the same otherwise.
So has anyone else run into this problem? I didn't call in to see if there are part number differences between the old OHV and the newer AVS, but EC only shows one number. The mount I received looks nothing like the one in the picture on EC's site, and indeed looks much sturdier with its extra reinforcements. Naturally, I received the parts on a Friday so I can't call in for tech information.
So, can I safely remove .200 from the bottom of this rocker mount? This certainly would be the easiest thing to do...