They make different versions of the 150 series, some are 1/2 wave and some are 5/8. The 1/2 wave will work ok without a ground plane and will be tunable even without much of a GP. It will give even better performance with a real GP. If you have a fiberglass roof, it's the one you want.
The 5/8 wave will give even better performance but requires a ground plane. Without, you won't be able to get your SWR low enough and may damage your radio. This is your best choice in general.
Larsen antennas are shipped long and will require tuning with an SWR meter. They come with a cut chart to get the first rough cut in the ballpark. If you run the spring at the base (I do that and it works great to keep the antenna and mount from being damaged) it comes with a cut chart to tell you how much antenna to clip off. That gets you close, and you still need to tune with an SWR meter.
I think the Larsen whip antennas are outstanding. They are tough, cheap, and the mast is replaceable for $12 if you damage it.
1997 FZJ80 Desert traveller
1989 FJ62-OME, 33s, OME suspension, H55f
1984 FJ60-SOA, H41, toybox, locked, 37s, Rubicon edition
1971 FJ40-SOA, FJ60 axles, 85 2F, it abides