I've owned a couple of '71 VW vans, one full camper and one smooth-top (non pop-up), Westy. 1971 is a desirable year for a few reasons, last year for type I motor, last year for small tail lights, first year for power (boosted) brakes and disc brakes, etc...
The type I motor is the bug type motor w/ gazillions of performance parts available and the huge aftermarket for same, but the type 4 motor is actually a lot stronger. (Structurally/bottom end-wise).
