Put the bolts in. Just drill the bolt, thats easy enough even for the novice. I even drill the tensioners for the extra bolt on the non magnum blocks. Best to have more support when dealing with the tension er.
I have built a lot of motors and tore down just as many. The bolt is not needed. the factory decided that after many chain set failures. The hole in the bolt does not flow enough oil to lube the chain. That is why they eliminated the bolt and installed a dripper. It directs the oil to the middle of the inside of the chain.
From the cam spinning the lifters. The lifters keep pressure on the front side of the plate pulling back ..
Now if I was a vender and was selling these bolts I would tell you to use them also.
If you really want to assemble your motor the way they were I have plenty of factory bolts. Don't try and drill one unless you have a lathe. the hole needs to be dead center so the bolt don't break when tightened.