[Excaliber]

With so many variables and choices for heads it is difficult to pick and choose. I'm speaking in general terms here, "counter point" to what I belive are basic myths concerning the FE series engines, posted in this thread.

Claims such as "no way a stock FE with period correct parts could make 600 horse." Pure BS, 600 horse is easy to make, with period correct parts. Using modern parts, on pump gas, with "nothing special" type of parts you can get 800 plus horse! Another "myth", High Riser heads quote/unquote, "didn't flow squat". What IS "squat" for cfm? 200 cfm? 250 cfm? I'm saying ANY head that can flow 300 cfm is "kick ass", compare whatever heads you want. It's pretty clear that LESS than 300 cfm will easily support 600 horse! High Riser heads with just a little work, will flow 300, tunnel ports with 2.25 inch valves, more.

Something not commonly known about the side oiler vs center oiler block, which share the same bore size. The side oiler bore is "notched" or "relieved" at the top to unshroud the intake valve and improve flow. The center oiler block is not. BOTH blocks will accept a High Riser head, but only the notched block will be able to take full advantage of the flow. So, when measuring High Riser flow, or any heads for that matter, is that flow calculation also considering the BLOCK bore modifications, if any. Or, is the flow simply measured at a given bore size with no mods?

As I mentioned earlier, High Rise heads will flow 290 cfm (500 lift, CONSIDERABLY more with higher lift). Shelby STAGE TWO heads will flow 293 cfm.