The heat shield hood pad is used for the turbo 300D's from the info I have because of the extra heat created by the turbo. The hood pad without the heat shield is used on the non-turbo engines.

Hope this helps!
Tom

__________________
America: Land of the Free!

1977 300D: 300,000+ miles

American Honda: Factory Trained Technician & Honor Grad.
Formerly:
Shop Foreman;
Technical Advisor to Am. Honda;
Supervisor of Maintenance largest tree care co. in US for offices in Tex.