RE: Lift pump going out
Actually you have several options...
The FASS, Airdog, and RASP are actual kits for upgrading over the stock LP...the BD (another OEM type pump) and bullydog (a gasser pump) kits I do not consider upgrades, but band-aids.
The FASS and Airdog are very similar (one's the father's company, the other is the son's company). Both are electric pump with filters...I personally went with the FASS because of price, following of buyers, and filter selection.
The FASS II is just a FASS pump, without filters...and after seeing the crap my FASS catches, I wouldn't trust the factory filter with the FASS II pushing.
And as for the heater, I have ran in -20* weather with no fuel heater...think about it...if it is that cold, it will gel in the lines from the tank (way before it reaches your heater)...I simply run fuel antigel at every tank.
The RASP is a mechanical pump that is mounted under the front of the oil pan...it is by far the most complex and still relies on the OEM pump to start.