6.4 build and swap 71 Dart, also 5.7 Hemi Van?

I just purchased a "core" block, crank, and pistons for a 6.4 as well as a pair of 6.4 heads. I bought them off an ebay seller that seems to be frequently listing 6.4 parts like blocks, heads, cranks, and engine covers. This was sold as a BGE truck engine but I have not unwrapped it from shipping yet. My brother in law borrowed my hoist ages ago and forgot how to return it. That is his last shot at borrowing a tool from me. Anyway I need to assemble my engine stand and get some bolts to attach the engine to the stand. Anyone know the size bolts needed for this?

Anyway I have not had a chance to take anything apart yet to check for damage but I am interested in reading information about rebuilding the engine. As well as sources for parts as it is in pieces I will need a lot of little stuff like nuts, bolts, starters, alternators etc.

I also have a 5.7 engine that has been sitting in my garage forever while I gathered parts for my dart. I am considering putting the 6.4 in the dart and the 5.7 in my 72 B100 Dodge van. I know Hotwireauto.com makes a harness for 5.7L Hemi with 545RFE Automatic which would make my big old van a better cruiser and hauler than the factory LA 360 727. Per Allpar the LA 360 has "255 hp and 360 lb-ft, gross, or 175 hp and 285 lb-ft of torque net" while the 2014 RAM 5.7 has "390 horsepower and 407 lb-ft of torque". YMMV

I realize buying a fully assembled 6.4 would have been a better option but I am trying to buy things with cash in hand and a fully dressed 6.4 was not doable for me now. Also the prices for 6.4's have come down with the economy and I had enough to buy the block and then a few weeks later the heads. Now to buy and assemble the rest.
Pics to follow in the next couple days.