Go for it.
The secret i found is knowing what to do before doing it. With the instructions supplied and the info on here your half way there. That and not taking too long to get the project under way, ahem. The sooner its fitted it the more money saved.
Front end kit is well covered on here and, if you need the car, can be fitted in a weekend, rear end is dependent on the tank you choose to suit your purposes, and can be fitted the next weekend.
Most go for a big as possible cylinder behind the rear seats. But i needed the through space so chose a donut tank in the spare wheel well reduced range but i'm lucky enough to have 4 or 5 lpg stations very near my commute.
Also helps to speak to an approved installer and find out whats expected to pass safety certification for insurance purposes on the fuel line routing to connect the two up and away you go.
Electrics all run into the fuse box for the whole install, rather than running wires all over the car, and is the only bit i bottled as i'm crap with electrics.Eternally greatfull to Kevin Wood for that job and input, and Lazydocker for his spare manifold in case i buggered mine up and general help, i guess the manifold is still out there for exchange/loan?
Hth :-)