J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment 2GM Heat Exchanger Questions

Ok here is a picture of the 2GMF on Vee Jay 2.
the red circle is around the fresh water cap. WHICH by the way is impossible [at least so far] for me to figure out how to take off. I have the feeling the motor mounts may have been replaced with higher ones by POs ... but that is just a feeling.

The fresh water pump is at the front of the engine. and the raw water pump below it feeds directly into the integrated heat exchanger which seems to be behind the fuel filter?

Have some of the boats had a 2GM or QM with an add on heat exchanger?