The V5 ECU can only take 7.2V, a two cell LIPO will get it going just fine, you will need a propane can valve adaptor, Dreamworks have them, you will also need cold glow plugs, I've been using K&B cold glow plugs lately with great success, you have to pull two coils out of the plug body to expose them to the gas for a more reliable start, two is all you need for now.
Get a strainer from HD to use as a FOD screen for $3 or one made for the P120 for a bit more, cut an X on the center of it, slide it over the started, add electrical tape to hold it down, add a small drop of mid CA to the tape to stop it from unwinding.
HD strainer on my SimJet 2200 on my first jet, a Kangaroo assembled nearly 22 years ago ( man oh man, times flys when you fly jets 😁 )
Ok, it's $4.5 my bad 😁
