Double check the
oil drainback holes from the heads to the block. The Edel drainback holes are smaller and sometimes don't line up that well. You can port the holes slightly in the heads if you feel it might be a problem. Some have found this to be a problem and some not so it's worth a look. Not sure if it's know or has been corrected by Edelbrock or not. Perhaps someone else might chime in as well. G.