Application for Flywheel Bolts?

[69VN]

Would anyone know what the application is for these flywheel bolts? Need to know what they were used on and what year. These length of these bolts are 1 3/16" long. They have fine threads, star washers and have a head size of 11/16". On the top of the head is a recessed dimple embossed with the letter "P". Any help would be great. See pics down below...

Thanks guys,
Sal

http://www.yenko.net/ubbthreads/pics/usergals/2015/04/full-13015-24130-flywheel_bolts_1.jpg
http://www.yenko.net/ubbthreads/pics/usergals/2015/04/full-13015-24131-flywheel_bolts_2.jpg
http://www.yenko.net/ubbthreads/pics/usergals/2015/04/full-13015-24132-flywheel_bolts_3.jpg

[Enoch]

57-76 GM manual trans. P headmarking I have taken off mid 60's to early 70's

[69VN]

Thanks Rich---needed to know before I post them in the classifieds.

Sal <<GRAEMLIN_URL>>/beers.gif