I have been overheating lately.  My mechanic says there is back pressure in my
system.  I have an 86 synchro with 196K, no history known on vehicle.  My
mechanic says I should replace the head(s), however there is no guarantee the
bottom end will hold up, the charge for the heads plus install is $1600 for
both sides, using new heads.  Complete rebuild using all new German parts is
$3200.  Is this too much.

Curtis