Lead - I would consider starting it up more often than that and keeping the gas tank freshened up and topped off. Otherwise, you could be asking for potential problems - one in particular is the battery going south - unless, of course you keep yours on a trickle charge and only connect it up to start it and run the engine up to temp. I think other than 5W-30, 10W-30 was the 'quietest' oil I used - even in my 2.0L Lima 4-cyl Ranger. I think part of the big help in reduction of the lifter tick was all the engine flushes I did (even though some will disagree with that) and switching over to the Purolator filter prior to my recent switch to Amsoil products. Seemed like even the cheapest of the Frams still contributed to my lifter tick during start-up or otherwise.

Anyhow, good luck on getting your truck back on the road and looking good again