My 422 smallblock build
The geometry was set up by Mike at B3.
Do you think longer pushrods would cure the overheating? Or could there be an oil flow problem due to improperly located oiling holes in the shaft?
BTW, you can check to see if maybe your shafts have the oil holes in the correct location while the engine is in the car.
Get whatever cylinder you want to check on the seat with the correct lash. Pull the adjusters out of the rockers and stick a small pick or pin or whatever you can find that will fit in the hole.
If it goes in and hits the shaft you know the holes aren’t lined up. That’s a quick and dirty way to find out if at some point Chrysler fixed the issue.
I figured it out one day by sheer accident. I had the rockers off but I had the number one rockers on thx shaft. I had the adjusters out because I was probably changing them out after killing some of them.
I still had the stands on there with the bolts in them so the rockers were where they would be on the engine.
I was walking to the back of the shop and the rockers just started to turn on the shafts and it caught my eye. Then I noticed, because the adjusters were out that I never saw the oil hole.
I couldn’t believe it. So I spun the rockers on the shaft many times to verify I didn’t just miss the holes.
That’s when I pulled the rockers off the shaft, put some bluing on the shaft and put the rockers back on and put it on the head.
Then I stuck a scribe in the hole to mark the shaft.
And they were off not only left to right on the shaft, they are off radially around the shaft too.
Like I said, they may have corrected that but I’ve not found that yet.