Go for the Audi 5 cylinder.  It has 130-165 hp (depending upon model), plenty of low-end torque, and no head gasket concerns.  For the moderate difference in cost, you get a tremendous series of benefits.  After all, that's how they make them now in S. Africa.

Budd Premack
86 Syncro, 84 GL(for sale soon), 73 Super
Minneapolis, MN (Land of Sky Blue Waters)

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