"Is there a cost effective way a do-it-yourselfer can get this done"

If I lived in Ketchican and didn't have a shop nearby that could do this for me, I'd go online and buy a 3' length of 3/4" o.d. allthread, several large diameter thick flat washers and a couple of nuts to match. I'd thread one of the nuts almost all the way onto one end, leaving a little "cup" to lay a bead of weld into to weld the nut to the allthread. I'd find a local with a lathe who could make a fixture for me to push the cam bearings out and in. It should be about 3/4" thick and just slightly smaller than the cam bearing bores in the block, so it will slide through the bores but still be large enough o.d. to bear on the bearings and push them into the bearing bores. Drill a 3/4" hole in the middle so it can slide back and forth on the 3/4" allthread. I'm not sure if the Ford bearings are different o.d.'s from the front to the rear of the block or not. You'll have to measure and see or maybe someone on here knows. If there is quite a lot of difference, you may have to make different sized pushers to different size bearings so that they will just barely clear the bore and push mainly on the full bearing sides without distorting them.

Have a buddy hold a wrench on the nut that was welded onto the end of the shaft with a couple of large washers up against the back of the block while you turn the other nut inside the motor to wedge the old bearings out and the new ones in.

I hope that at least some of this makes sense. I can visualize it clearly, I'm just not very good at explaining it.