Well I now have 3 different GM cores to play with.  The first one I acquired was very large at 3.75" thick.  The next one was the same in the length width dimension but was 2.75" thick. Large one has a cooling volume od 300 cid, the next one is 220 CID and the small one is 186 cid which I think would make a good oil cooler. I decided that some testing should be done to select the proper unit.  The radiator and oil cooler will be mounted to a frame inside of a belly scoop.  The whole assembly will be removable from the airframe.  That way changes can be made without bringing the A/C home into the shop.  I would like to build this unit up and instrument it with a manometer and mount it to a vehicle and road test it.  With the three different types, flows through each core can be compared.  It would also test the scoop duct design.  Is this worth doing?  Am I making this harder than it should be?  I have a picture of the front view of Rusty's RV in the shop and I really like the idea of one size evaporator fits all. Rusty, keep us posted on cooling data.  Thanks for any help.


Joe Berki
Limo EZ