If you want to move up into the 1980's you can buy one of these at any parts store-
"For" a 1995 F150 5.0 for example. Newer style, different mount, slightly different hookup, but I can't say that one is actually better
. ylexot might have an opinion on that.
I'm running one of these in the trunk of my '67 (along with the battery) and a late style Ford PMGR starter. Works for me.