Those headers look good!
"........As you are likely aware the early Hemi is an incredibly wide platform and requires being centered in the engine bay to clear the inner fenders / OEM shock mounts. Might not be too bad if it were not for having to have some kind of exhaust manifolds / headers......."
Oh, yeah. An additional thing I'm looking at is the additional height and width I'm picking up with the aluminum valve covers, hopefully I'll be able to run them but I may have to go back to a stock set.
I'm hoping the shorty headers tuck into the block tight enough to alleviate steering shaft issues, but there is always the option of building a custom steering shaft (I had to build a 3 piece shaft when I put the 331 in the 37 Dodge truck). For a 354 CI street motor I figure a 2 1/2" exhaust will be sufficient, which will make routing the exhaust a lot easier than going big pipes.
I think I have the oil pan sorted out, as a 57-58 392 mid sump pan and pickup should clear. Nobody's reproducing them but they occasionally show up on ebay and swap meets and in a pinch can build a custom pan if necessary.
Fortunately I have a builder 331 I can use as a mock-up motor and I'll be checking with my buddy at the transmission shop on Monday to see if he has an 46RH/RE case and OD housing I can borrow for a while to test fit and do my fabrication.
"......Hot rodders are a special breed. We'll put a helicopter engine in a submarine if challenged....."
Well yeah!!!! lol If it was easy everybody would do it.