wath i mean for the heating is that prestone is flowing inside the intake manifold... when you look at it closely... you can see 2 hose connected from the manifold to the tbi... those a prestone line !!!!.... after 2 head gasket i know  ... prestone gets in from the pump side goes up in a canal falowing #1 intake tube then goes out below the carb.. goes in the carb by the hose.. the rest is the inverse to the #4 intake tube.. goes back in the back of the head just beside the thermostat housing... 
Look at it closely youll see wath i ment !!
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Crazy !
Sentra Sport Coupe 87 Turbo
14.850@97.454mph
H&R Spring, 15psi, TMIC, 370cc, Nismo mount and pulley, Almasi tuned ecu...
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