removed driveshaft to replace manual trans in my 86 b2000, however when i went to reinstall the alignment marks that i made on the driveshaft are no longer there!!! can i just bolt it back in or do i need to do something???before or as i install to keep it balanced? thanks edsel...

No , the drive shaft is ballanced on its own. No need for marks, slide that puppy in.:rofl: