Motor Mounts and Steering boxes... oh my!

[1959 Apache 3600]

OK gents.. I'm posting my question after searching without favorable results here.
'59 3/4 ton Apache. Everything's stock, no IFS or anything of the sort. I plan on putting my big block (chevy 454) into this pig, and have two questions (so far).

1) I see aftermarket crossmember/motor mounts advertised at a few places. IIRC, some list it as a SBC mount and others just say Chevy V8. Has anyone have any experience with these and a big block?

2) It's pretty obvious the stock steering box won't work with this configuration, wondering what others have done with the steering while accomodating a big block?

Just trying to plan ahead...
Thanks in advance for your advice / suggestions!