For some past EMC entries Jesse has reworked heads far beyond what I’ve ever done(the PC “Victors”), so he knows what it can take to get a combo for these events sorted out.
That being said, I think trying to have 3 sets of high effort heads for this build could be spending time on something that could be used better somewhere else.
“How I would approach it” is......
I feel “if” the 308 intake port could be made to flow as well as the X head....... then those are what I’d use.
If a suitable guinea pig 308 head could be had....... I’d start with seeing if the casting can provide the needed intake flow without any holes appearing in it.
The ex ports are better than any other stock heads, so that side of the head should be an issue.
My suspicion is that Jesse has probably already done some pretty high level X heads...... at least good enough to where he could assess if the 308’s have the same potential or not.
I’m not really sure what the thought process is on also wanting to do some J heads, along with the X’s and 308’s.
