Posted by Jonas. on Saturday, October 26, 2002 at 5:18PM :
In Reply to: 251 with 5 speed tranny posted by Drew Rogers on Friday, October 25, 2002 at 2:04AM :
More than likely it's a Direct 5th. I say this because most big trucks that had the flathead, did not have the power to weight ratio to push a OD5. The only way to truly tell is to pull the trans and turn the input shaft to see if it mathces the output yoke.