The price of a galv chassis certainly looks higher than it was, which is a real shame. When I look at old build threads and see the prices paid I am shocked at the prices now.
The other issue with a new chassis is all the new other bits too. With a 30 year old truck I would expect quite a few additional items required and that may not go down well!!
I do expect a change at some time, but until that point I am trying to do other jobs that are more manageable financially. I have already swapped both axle cases - one cost me £80 (rear) but needed the full electrolysis treatment, however the hubs and stub axles were in good nick on that so it worked out being good value. Fitted Timken bearings, Corteco seals but Britpart calipers and discs. I have done a similar thing with the front axle but I picked up an axle case for £100 (that one was in great condition and looked brand new - I thinkitmust be off a TD5 as it didn't have a tapped breather). That has had the same treatment with seals and bearings, plus new swivel housings (thankfully I got my swivel kits for around the £120 each mark where now, only six months later, they are in the region of £180!). Also fitted a set of calipers and vented discs which I managed to get for £100.
It's a slowly does it approach but my spending is not raising too many eyebrows!
If I can get this crossmember and front outrigger done then underneath it will look tidy enough for now.
As you can see it's a bit of a budget "improvement" but without cutting corners on important things like seals and bearings. Hopefully it will last me quite a few years.
But the bodywork is another story.......!
Top tip - don't take your gearbox cross member off 
