Well that isn't what I had planned (I uploaded a bunch of pics and now I can't remove them from the post...)

An explanation of the above mess

image 1 - mocking up my new A/C condenser core.

Ebay purchase listed as CNFP1421KT - 14" x 21" parallel flow condenser with dryer and fittings included. I decided bigger was better and I guesstimated that this would go in - barely...

image 2 - the comparison in size of the old condenser vs new.

image 3 - the single wire thermofan sender installed into the bottom tank of the donor radiator.

image 4 - front view of the modded donor radiator installed.

image 5 - 2 x 10" fans that are being mounted to the back of the condenser and will be sandwiched between the condenser core and the radiator.

If you are considering installing an aftermarket A/C consenser for your Gen 1, a 13" x 18" will be easier to fit in there and won't require notching the upper core frame rail to clear the hood catch mechanism like I've had to for the 14" tall core assembly (yes, it is that tight I had to hack a section out of the top mounting frame rail...)