I haven't broken one in a long time, and the last one I broke was undoubtedly due to bad habits in tightening them down back in the late 80s/early 90s. It broke in the middle too. In fact, when my Mustang was a 433, I ran new stock shafts with stock adjustables and old school triple springs with some pressure, wasn't the right thing to do, but it hung in there
I'll likely go with stock shafts and end stands, BTW fekbmax, on your comment of both, this is an iron head 4x4 truck motor, although it may see 5500, it's rarely run hard.
Basically, it's a 200 dollar bill either way, and one thing I didn't realize is that the long finger tins wouldn't work with the RPM intake. I hadn't tried it yet, just assumed they would, and I have no qualms bending up a stock set of later tins!