RARE 6 bolt block! but can i use it??

[4g63turbo84]

i found a 6 bolt block and i plan on using forged internals and ARP mains and a kiggly main girdle... but the only thing that worries me is the main caps!!!

here is the link....

http://www.dsmtuners.com/forums/newbie-forum/445428-help-identifying-my-block.html