Daytonatrbo,
Welcome aboard!
Your question about multifuel capability is discussed at length on this site; please take a little time to look around for answers to things like that before starting a new redundant thread or topic. Some folks get real touchy about that (something about rules). The short answer is that the FDC is there to try and give a consistent pedal “feel” and response with a wide variety of fuels. If you stick to a similar blend or type of fuel it makes no difference (to feel or multifuel capability). I’ll get back into my choices of fuels below.
If you bypass the FDC you should add a thermocouple (pyrometer) in the exhaust to monitor EGT’s. My setup has a pyro and boost gage. I recommend getting this installed before you bypass the FDC so that you get an idea of how the EGT’s behave before making modifications. JATonka has a very nice write up on his web site. His site has lots of other info, including TM’s. I downloaded all of the TM’s I could find from here, JATonka, XM381, etc. I’ve bypassed my FDC and not touched the adjustments.
I’ve been heating WVO and WMO, running through a PA Biodiesel centrifuge, and then a NAPA 3674 2-micro rated filter. I find that either give lower noise than #2 with 15-20% BIO (all we can get here in the NW). I think both start more sluggish than #2 in warm weather and it hasn’t gotten cold yet while I’ve been doing this. My plan is to run WVO in the Summer and WMO in the Winter depending on my supplies. I find that WVO and WMO smoke the same as #2 (or perhaps less?). I add about 20% #2 to keep them thinned out. I think power is a little lower with WVO, yet I think the truck runs best on WMO! Yes, I think it runs nicer on WMO than with #2. My blend of WMO is a mix of engine oil, gear oil, ATF, etc. Waste ATF in the WMO is great! My 2 cents. I plan to make a Youtube video or my setup and post it when I have the time…
I also highly recommend giving your brake system a once over, starting with MC, air pac, and wheel cylinders. There a great thread here on the front axle StepXStep and peashooter has a great thread with brake part info. As a part of this, dump the axle vents as they are known to plug up and cause a blast of gear oil and grease to get blown out all over you brakes. I ran a ¼ inch line around to properly vent all axles, the TC, and transmission.
Good luck!