I would say with your situation to just leave it untapped until you get the trans taken care of. I dont know what your VP situation is but if you've changed both of those out in short time by having them tapped I would get a good pump from Industrial Injection. I personally have been running one of theirs for 212,000 miles and I have thrown several different wire tap chips at it and never skipped a beat. Included is an Edge Hot Comp, Redline, Quadzilla Zillaraider, and a TST PM3. I have literally thrashed on this pump and it still runs like new. Ive also installed several VP's in customers trucks that are also run hard and Ive never had a complaint about them. Industrial Injection builds the best reman pumps available if you ask me.
As for your trans... get a Dave Goerend transmission if you want to be able to use the Edge Comp any time you want with no worries.