When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Re: Stepped or flat guide plates? (Nathan Plemons)
The stepped type are touted as being the best because they intersect the pushrod at a high position, giving more stability.
Rocker clearance may or may not be an issue, it's just something I'd check.
My heads came with flat and I did have a set of stepped, but I didn't swap them. I figured Edelbrock knew what they were doing when they selection the guide plates for the heads.