Nice. We have made our holidays with a 1991 westfalia california for 10 years; indestructible engine as long as you don't let it get too hot because they can't handle that (watch out at 90° and let it cool down -it’s done quickly- and don't let it get to 100°). Ours was sold last year and had 345,000 miles and ran better than when it was new (said the vw garage owner). They can still keep up with traffic but that's about it; they take you everywhere but at their own pace. We did many mountains and he never let us down.
The westfalia interior is heavy and solidly built to last forever. Rust is less of an issue with the first (1991 to somewhere early 1992) because of where they were manufactured then but you better still look out for it, especially on the wheel arches and at the bottom of the front window. Later ones rust much more and in different places (the latest ones are slightly better).
Ours got us hooked on this way of traveling and now we have a small campervan (t6.1 california coast) again and we just carry on as before (but now with air conditioning, more horsepower and an automatic transmission).
Maybe you know these but here’s more info:
https://westfaliat4.info/html/vw_westfalia_t4_transporter_model_history.html
Or
https://www.weetjewel.nl/phpbb3/index.php
They are great campervans. Have fun with it!
View attachment 111432
One of the last pictures taken from ours on the last trip with it (UK, April 2022)