Cylinder heads are fairly serious, I'd say they flow at least 300cfm. Headers are 1 7/8" primary tubes. Cam is a solid roller, 263/268 @.050".
In general, I'd agree there's no reason to rev a stroker that high. In fact, the previous configuration of this motor stopped making power at 6,000 rpm. It's a totally different setup now though and it should still be making power at 6,500+.
I did a little more research on what needs to change to pushrod oil. Basically what this boils down to is that it's probably not worth taking the whole engine apart again to convert it. Even if I had thought about it before I put the short block together at a minimum I would need to get new cam bearings installed since the timed cam journal oiling holes in #2 and #4 that feed the heads get rotated/blocked to prevent too much oil from going to the heads. Can't really have both methods at the same time because you wind up with excess oil up top.
There are are other methods to do it such as installing threaded plugs in the deck oil feed holes but I would have to clean the block after tapping it and I'd still need pushrod oil rockers. The only ones I'm sure that do are the T&D which other than pushrod oiling I have no need for.
Next build I'll think about it ahead of time and if it makes sense I'll have the machine shop take care of all these passageway mods. I still think it's a reasonable consideration at my current level but probably not a necessity. Guess I'll find out the hard way if the stock oiling isn't up to the task but I'm not real worried about it now that I have a little better grasp of it.
This is the first time I've ever seen that modification and I'm not sure I understand how it works. Is that bolt hole connected to the head oil gallery somehow?