If I would be doing it over again, I would use one of two set ups.
This set up from Muscle Rods:
http://www.brphotrods.com/mm5/mercha...gory_Code=CNV9
Or this one from CPP:
http://www.classicperform.com/Store/...366LS1-CIK.htm
The fuel system with a stock tank info you posted looks good, just add the prefilter like this one: You would need some -8 to -6 adapters....
http://www.summitracing.com/parts/su...18-b/overview/
Evap: Remove and plug with GM PN 12558346 or a Dorman Freeze Plug #555-093.1
I used a LSA oil pan (GM PN 12631828) and pick up to replace the truck pan that my 5.3 came with. Like this one:
http://www.ebay.com/itm/oil-pan-kit-...#ht_388wt_1266
I am actually in the process of planning to do another LS swap into my '65. I already have a bunch of the parts I am going to use. I just need to get the frame stands and motor mounts at this point. I used the Muscle Rod mid-lengther headers on my last one and will be using those again. I am leaning to just getting the new CPP sheetmetal mounts and the slider mounts that they make:
http://www.classicperform.com/Store/...s/LS1-KU-P.htm
If I had to start from nothing, I would most likely do the CPP kit I listed above and get everything I need at one time. Seems to be about the right total if you get the parts separately IMO.