one thing you can try, my grandpa told me was to put an 8 volt battery in. he said they used to do that on his dad's farm, it cranked better and was a little stronger, i don't know if you can still buy 8 volt or not.
1949 Chevy 3600 Flatbed all orginal 1964 gmc 4000 1973 gmc 6000 2005 chevy duramax 4x4 1994 chevy 1500 Trucks are GM and Tractors are Orange
"I don't measure a man's success by how high he climbs but how high he bounces when he hits bottom." - General George S. Patton
