http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/PartSearchCmd?storeId=10151&catalogId=10051&langId=-1&pageId=partTypeList&suggestion=&searchTerm=433433 I'm using the above radiator in my 56 Exec. It is a TITE LINE-to-LINE fit in the recess of the horse collar. Also check for hood clearence with radiator cap. MIne has a very uncomfortable 1/32 inch clearence but has presented NO problems over the last 3 years of use. Be sure that hte upper tanks bottom edge does not rub the horse collar when installed.
For installation i removed the Ford side brackets from the new radiator. Used a 1-1/2 x 1/8 steel support along bottom of rad with cradle type rubber saddles (ala GM). The suppoort will require drilling 2wo holes in each frame rail for mounting. Used rubber Gm saddle type upper radiator mounts at each angles end of upper tank.
It's a real bitch to install but has worked out just fine for me over the last 3 years and 6-8k miles.
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