This is the Ertl International S-2674 long wheelbase tractor. The Ertl kits were very good kits for accuracy and to build. They can still be found, but the prices are getting rather high.
International trucks were built in the USA by International Harvester Co. from 1914-86. Since 1987 the company has been named Navistar International Corp. but it continues to use the International brand name.
It looks like I have a front wheel leaning a little on this one. Next stop, back to the workbench for a fix.