SB Cam Thrust Plate questions

Ok I took apart my old 273 laying around. it has all 4 solid bolts holding the plate and it is the old style that is machined flat against the block and does NOT have the plugs in the block I asked about in the question above.

The new style plate is machine in a design that looks like some oil will seep out since it is machine with cut outs. Take a look at the pics below.

So should I just use the new style plate and the 4 solid bolts on the 70 340?
I have seen these setup some many ways in 318's 360's etc. over the years, oil bolts, solid bolts with tabs, no tabs, even a bolt left out.

And lastly just do not put the plugs in the oil holes in the block?

thanks guys!

thrust plates.jpg