And now for the voice of insanity!! America has loads of 40s with small block V8s and reading i8mud.com virtually none of them have transmission problems... cooling problems - yes, transmission probs - no. Mr T's transmissions can take it.
I've seen this truck while it was at Duck's Cross and it has been built to a v high standard, although I'd colour tone the front wings but DC is one of the best 40 builder/restorers around.
And finally, the days of getting a restored 40 (standard or modified) for a few grand have long gone. This is a lot of truck for (currently) under £10k.
Our old girl was up to 130 kms the other day and was perfectly happy with more available but, admittedly, it wasn't wet!