Yeah you should be able to swap the heads as the engine blocks are the same, check out the forums at http://www.teamswift.net it has heaps of stuff on these engines and you should be able to find some answers there.

yeah, i managed to sell it for $1000 minus the shocks $300 towbar $150 rear bumper $50.
all have left is the set of seats from a crx which i had in it, and the wheels. so i didn't lose too much.

cheers for that guys sorry should had said what truck i was looking for i now have suzuki escudo '89, the yellow '84 surf became the yellow submarine i sunk it in a river , lesson learnt the hard way don't do river crossings at night! and it was also tidial!

Just interested in finding out how many of you are using new ring and pinion gear ratios when running larger tyres, and where the best place to get them from in NZ.