As this is the "Mother of all Threads" on the subject of reliefs. Here is a "stepped" relief that I did on my own "experimental" 284 cubic inch engine that is in my 32 Cabriolet.
I did this to mimic some of the Harkey KR race jugs that I happen to have. I've used this engine to try some different ideas, concepts and parts out on.
It has a big-ass roller cam (huge duration and .420 lift), coatings on pistons, valves, cometic MLS head gaskets, etc..
A guy needs to have a flathead "playground" to have some fun in. LOL
SteppedRelief1.jpg
DeckComplete.jpg