906 or 452 which is best overall

I actually prefer the 346s, with 452s a close 2nd. I've never gotten the numbers Jim does but that means little to me (or him I'm sure...lol). The 906s are the standby but to be hoest the castings are hard to find two really good non-shifted examples. There are those that like the 906 "F" castings but the few I've seen looked no different and I'm sure they modify the crap out of them.