You cannot use a buggy/truggy engine in an LST truck. You must use an engine with a starter system of some kind. The rotostarter/spinstarter variety work best. Stay away from pullstarts due to the engines being hard on them. They tend to break pretty often.
Get 10 posts and you’ll be able to post pictures.
The Novarossi Truggy 28-8RT is a perfect choice.