I used this pump........no worries about timing cover , spacers etc.
Ryan at Shady Dell had the aluminum core plugs that are threaded for 3/4 NPT and went with -12 line into each center core plug.
One benefit was that I had a lot of options for where to locate it.
I don't have a pic yet , but it is just below the outlet on the radiator and maybe 8" back , so a short 1 3/4 "L" of radiator hose was all I needed to get it fed.
The 55 GPM might be a bit generous , but the stat will help there I think. I am pretty sure they make a 35 GPM in the same configuration.
http://www.meziere.com/ps-1134-1102-wp316s.aspx