Have a look at the following website, it has some info on swapping a G13b head onto a G16a block.

http://autospeed.drive.com.au/cms/article.html?&A=0004

I am currently making up an alternate set of mud tire to run on trips only. I want to get some inner tubes in these but have been told that most inner tubes now days are too thin for offroading.

Is this true and if so, does anyone know where to get some decent tubes?

Cheers
Dan

We had the same issue with our 1990 LWB Safari. Tried a new streering damper, rebalancing the tyres, swopping the tyres around (at 2 different shops). Had several garages give the front steering/suspension a once over, all said there was no problem and all the bushes were fine. Finally told garage ...