I was thinking more along the lines of an inexpensive cast stroker just to keep the air moving through those ports at lower rpm. The 429 can be a screamer. I do remember the early hydraulic cams throwing lifters out of the bore. I think the valves would float and then everything just goes bad from there. Sometimes just the pushrod, sometimes not so lucky. The biggest issue for the 33 is the space against the rack. I think I could get the exhaust ports clear of the UCA. Probably could just stick a powerglide behind it for reverse. Don't need gears to go.
I have thought about using a 2 bolt main block with those heads just for looks. Pricey cosmetics. Gotta find someone crazy enough to fund it. Couldn't talk my brother into it. He has 2 with CJ heads already. I don't remember why I have a 429 short block anymore. Probably a trade. Wonder if it would fit in a Gen III type 65??