Nice that the module's been replaced. We had a 1983 E350 and the OEM module never actually quit. But the epoxy-or-whatever "potting" that protected its internals got old and tired. Sometimes we'd stop at a rest area on a hot day and the thing'd drip hot goo on the pavement. I carried a spare and finally cleaned the goo area up and installed it. Just couldn't stand the look.
If yours has the cylindrical ignition coil (metal "can" with plastic terminal end), a spare one of those is a good idea. They get hot and tired. May not re-start on a hot day. We actually had one shut us off on the road. Rolled into a service station and found it'd start again once it cooled. Replaced coil and had no further issue.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB