90 with a 6 cyl

[McCohens at aol.com]

I am a diehard 5 banger junkie, but found a 93 90 quattro with the 6.   Owner 
says the only issue is a bad thermostat that has caused overheating.   How 
strong are these engines and what should I check for?  The thought of  blown 
head gaskets and such have me concerned.  Also saw a pic of the  engine and I 
have a feeling even finding the thermostat could be a  challenge.  How do these 
compare with the older engined  cars?