Very early ones were 235 hp, later ones after about SN 5000 (if I remember right)were 270 hp. Of course, the 46A was the power shift version.
Weight with ripper and all should be in the 32T - 34T range.
Somebody on here will have the exact specs, but this should help for now.
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This add says they had 2 for sale, and they may have some paper work to help you.
They have phone #'s
http://www.rockanddirt.com/equipment-for-sale/CATERPILLAR/ALL%20D8/invnum=32554449
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