Throttle Body Injection works more than OK for 4 bangers.
A later AMC CJ 4 cylinder I can see.
Willys did an exceptional job of making their stuff very future unfriendly. Finding previous owner’s half done fixes in a few places hasn’t helped.
As for the 65 all I care about is something to bounce around in some. Top speed is maybe 50 downhill. That thing is geared so low.
Unless something chronic occurs, that F-134 stays pretty much as it is.