Amateur in need of help! (engine stand)

Hi guys!
My name is Jacob I am 19 and new to the forum. Ever since I was little I have always loved muscle cars and have a severe passion for anything mopar! So I am very much looking forward to being apart of the forum but I acquired a 72 cuda about 2 weeks ago that I am looking to build up over time. The original 340 was blown in the mid 80s and has a 318 in it right now, I pulled it yesterday and have it on my back porch now on a slab of plywood. I am looking to rebuild the 318 for the time being but I am kinda confused about mounting the block to the mount plate on the stand.....I understand where the legs "should" be attached but wanted to ask you guys for advice?? the bell housing bolts are 5/16-16 and the 2 holes that are at the bottom of the housing look to be about 3/8 but my main question is that where the legs should attach to at the bottom under the plugs are not threaded they are just holes.......haha yeah I know I will get that so you are going to rebuild the engine yet you cant even mount it to the stand??? I am just wondering from you guys what would be the best way to mount it mostly pertaining to those bottom bell housing holes??? just thread the bolt through the plate,legs,block then lock it down with a nut?? I really appreciate the help guys and love to be a part of this awesome forum!

yes yes yes I understand my cuda isn't an A body but its my Cuda! its my Mopar! and its now my baby!:cheers: :prayer:Thanks guys!-Jake