'63 230 to 283 swap question

[greenmtnboy]

I am going to be attempting a 1 weekend engine swap on my '63 C10. It is currently all stock with a 230 3 on the tree manual. I have 60's 283 with the clutch pivot boss. besides the obvious engine accesories what else is different? specific things I am unsure of are:
Motor mounts
Flywheel
Clutch linkage(mechanical)
Throttle linkage? I have a stock 19?? 2bbl carb and intake to use.
Will centerdump blockhugers work?
Radiator...I have a brand new 6cyl rad in it now....can I get by till summer?
I'm looking to get this done with as few trips to the junkyard or parts store as possible. Any help with "must have v8 truck parts" or advice is greatly appreciated.