My 2 cents probably isn't worth 2 cents but I would look at what the commercial guys use and to the extent possible and within financial reason model something after them. My first Jeep was and is a 1990 xj inline 6 and I wud never give it up and it has never run better thx to Dave and Eric. If airbags are the thing them use em, if u want to experiment then u may not be happy or it may work out fine, sometimes the flip of a coin. Jeep forum in the US usually has someone who has tried and succeeded and many more who have not so very likely someone has tried this before. I expect you will make the right decision. I grew up on a farm and whenever my father was thinking something thru in his mind, he went outside, looked at what he was considering, sat on a home made sawhorse and rolled a smoke, by the time he was done, he usually had an idea of what he wanted to do. Maybe you need to build a sawhorse first and roll a smoke, tough to beat an xj.